FusionDex

This giant Pokémon carries a small mountain atop its back which is often encircled by smaller, aerial Pokémon. The fruits that grow upon this small mountain are incredibly tough and contain a poison that must be cooked out.

Tyransaur's flower is said to take on vivid colors if it gets plenty of nutrition and sunlight. A Tyransaur is so overwhelmingly powerful, it can bring down a whole mountain to make its nest.