Timon, a meerkat significantly smaller than Roo, would find himself in a surprisingly snug, albeit somewhat damp and possibly musky-smelling, pouch. The initial impact would likely cause a startled squeak from both Timon and Kanga. Kanga, being a motherly kangaroo, would probably react with a mixture of surprise and concern. She might instinctively try to adjust her pouch to better accommodate the unexpected guest, potentially causing Timon to bounce around a bit.

Depending on Timon's temperament, his reaction could range from mild panic to gleeful amusement. He might initially try to scramble out, finding the confined space claustrophobic. However, the soft fur and relative warmth of the pouch might eventually soothe him. He might even find a certain comfort in the close proximity to Kanga's body heat.

Roo's reaction is crucial. If Roo is present, he might be initially confused or even frightened by the strange creature in his mother's pouch. A playful interaction between Roo and Timon is possible, though Roo's size advantage would likely mean Timon would be on the receiving end of any playful nudges or attempts at interaction.

The scenario's outcome depends on several factors: Kanga's tolerance for unexpected guests, Timon's ability to adapt to the unusual situation, and Roo's reaction. It's plausible that Kanga, after a moment of surprise, would gently nudge Timon out of her pouch. Alternatively, she might tolerate his presence for a short while before gently encouraging him to leave. Timon might emerge slightly disheveled but otherwise unharmed, perhaps with a newfound appreciation for the spaciousness of the African savanna compared to the confines of a kangaroo pouch. The overall tone would likely be humorous, highlighting the absurdity of a meerkat in a kangaroo pouch. The scene could end with Timon recounting his bizarre adventure to Pumbaa, embellishing the details for comedic effect.