The T-Rex is Humba Wumba’s transformation in Terrydactyland and the fifth ordinary world form in Banjo-Tooie. It has two sizes with different uses: Baby T-Rex can enter small dinosaur passages and perform a coded call, while Daddy T-Rex can frighten a cave guard and operate a switch too heavy for the smaller form. Both retain Banjo’s yellow shorts and blue backpack, fitted to an olive-grey dinosaur body with a long tail, large head, short forearms and clawed feet. Humba’s wigwam stands on the far side of the central mountain from the world entrance, near the area beneath Dippy’s empty pool. Activate the nearby warp pad before going inside. A convenient Glowbo is reached as the normal duo by using Flap Flip to enter the reddish tunnel behind the wigwam, then Talon Trot to climb its steep slope to the higher ledge. The Glowbo behind Mumbo’s Skull is a separate nearby source for recruiting the other shaman. Offer Humba one ordinary Glowbo and enter her pool; with the wigwam at its original size, the result is Baby T-Rex. Later transformations at this pool require no further payment. Initially the Baby can only walk and jump, and its roar must be learned outside. Its smaller health bar and lack of a damaging attack make it less suited to combat than the normal pair, although it can cross the swamp near Mumbo’s Skull without the usual ground hazard. Bargasaurus dinosaurs no longer pursue it, but touching them still hurts, and flying Soarasaurus remain dangerous. The disguise therefore changes particular encounters rather than making the whole world safe. Return to the pool to restore Banjo and Kazooie whenever the route requires their climbing, egg attacks or other normal abilities.
Learning the Roar and Opening the Dinosaur Doors
Approach a Bargasaurus after becoming Baby T-Rex and it will teach the dinosaur’s call. On Nintendo 64, tap B for a short roar or hold it for a long one; the corresponding Xbox button is X. A roar opens the round stone doors marked with the Baby’s face, giving access to passages that the ordinary duo cannot simply walk through. The door immediately behind Wumba’s Wigwam leads into a fenced-off part of Inside the Mountain. Collect the Cheato Page there and read the sign explaining the secret dinosaur code, then return outside. The other nearby marked door is reached along the short rising path beside the Path to Nest sign, to the right when facing the wigwam entrance. It leads higher up the mountainside toward a Jiggy sealed behind a wooden gate. Prepare the connecting route before making this journey transformed: a Rocknut blocks a narrow tunnel along the mountain path, and Baby T-Rex cannot defeat its armour. As Banjo and Kazooie, use a Clockwork Kazooie Egg to reach the exposed rear and detonate behind it. Jamjars teaches those eggs in the Isle o’ Hags’ Wasteland for three hundred and fifteen Notes. With the obstruction removed, the smaller dinosaur can use the tunnel to continue around the mountain instead of attempting the normal duo’s larger jumps. Stand in front of the Jiggy gate and perform six roars in order: short, short, long, short, long, long. Release the attack button between calls so that the brief and held inputs remain distinct. The completed call opens the gate, allowing the Baby to collect the Jiggy directly. Its roar is useful for these doors and the sound puzzle, but does not acquire the adult form’s ability to frighten the Oogle Boogle Cave guard. The Cheato Page and coded Jiggy are separate rewards reached through different marked doors; entering the first alcove alone does not complete the mountainside puzzle.
Mumbo’s Enlargement and the Timed Jinjo
Daddy T-Rex requires both shamans. Restore Banjo and Kazooie, collect an ordinary Glowbo for Mumbo Jumbo and recruit him at his skull across the swamp; the creature behind the skull provides a convenient payment. As Mumbo, travel to the pad immediately outside Humba’s wigwam and cast Enlarge. The building grows, including its interior and pool. Return Mumbo to his chair, regain control of the duo and visit Humba again. Entering the enlarged pool now produces Daddy T-Rex without requiring another Humba payment. This is a change to the wigwam’s spell conditions, so the Baby does not grow into the adult merely by walking beside the building. Mumbo can use the same pad to shrink the wigwam when the smaller transformation is wanted again. The adult towers over ordinary dinosaurs, has no visible health bar and can destroy smaller enemies by stepping into them or using its powerful roar. Its size also imposes substantial restrictions: small dinosaur doors and most interior passages are inaccessible, and warp pads cannot carry it. Plan the return to Humba on foot rather than relying on a warp back. An oxygen meter is also associated with this form, although the game does not explain the reason for its presence. The large dinosaur-marked floor switch near the wigwam uses the adult’s weight to open a nearby cell containing a Jinjo. Stepping on it starts a thirty-five-second countdown. Daddy T-Rex cannot fit into the opened cell, so immediately head back into the wigwam, enter the pool to restore the normal duo and run out to collect the Jinjo before the gate closes. Transformation and travel both consume the available time. If the timer expires, return to the enlarged pool and operate the switch again for another attempt. This rescue is distinct from the world’s other gated Jinjos, including the one reached with a Clockwork Kazooie Egg and the one released by an underwater Talon Torpedo switch.
Opening Oogle Boogle Cave
The adult’s other essential task is removing the Unga Bunga guard outside the Oogle Boogle Tribe’s cave. Follow the broad tunnel away from the wigwam toward the train-station side of Terrydactyland, then approach the ramp below the guarded cave. A loud, held roar from Daddy T-Rex frightens the guard into abandoning his post. Return to Humba and restore Banjo and Kazooie to enter the small opening. The frightened guard does not hand over a Jiggy: the transformation has opened a route to three cold, hungry Oogle Boogles, and the normal pair must complete their rescue. Light the extinguished fires with Fire Eggs and reach each resident, including the one on an upper ledge accessed by using Bill Drill on a boulder to reveal a Shock Spring Pad, then Grip Grab along the wall. Their food comes from Al’s burgers and Salty Joe’s fries in Witchyworld. Open the cave’s rear connection to the high passage in Area 51, then bring the food back through that route; the park’s ordinary exits confiscate it. The return climb requires Claw Clamber Boots, taught by Jamjars near the Elevator Shaft on Grunty Industries’ first floor for five hundred and five Notes. A pair on top of the Big Top lets the duo climb the marked footprints in Area 51 to the passage. Warm and feed all three residents to receive their Jiggy. These later egg, climbing and food-carrying tasks belong to the duo, while the Daddy form supplies the initial intimidation. The dinosaur also connects with an earlier joke in Banjo-Kazooie: Mumbo claims to have a T-Rex spell, then says he will save it for the next game. Tooie makes the transformation playable through Humba, with Mumbo contributing the enlargement. A Daddy T-Rex model is subsequently displayed in Banjoland in Nuts & Bolts, preserving the oversized design as a museum exhibit.