It flies by flapping its broad leaves. The bunch of fruit that grows around its neck is deliciously sweet. In the spring, it scatters pollen from its neck.
(From Bulbapedia)Tropius is a large sauropod-like Pokémon with a brown body wrapped in green leaves on its chest and head. It possesses large, broad green leaves on its back, which it uses for flight and for sugar production via photosynthesis. Despite being very big and bulky, it is surprisingly maneuverable in the air. It has a long neck, which it uses for reaching treetops to gorge on its most favored fruit. Since it ate only this kind of fruit continuously, the fruit began to grow around its neck. These yellow, banana-like fruits can be picked and consumed by other Pokémon or humans, and grow twice a year because of the rapid production of sugar in Tropius's leaves. Its feet have toenails the same color as its fruit.
In warm areas, there are ranches that raise Tropius. In Alola, its fruit is especially sweet compared to those of other regions. It lives in tropical jungles.
(From Bulbapedia)Tropius resembles a generic sauropod (a long-necked, herbivorous dinosaur) combined with a banana plant.
(From Bulbapedia)Tropius is a combination of tropical and saurus (Greek for lizard). It may also be a pun of tropism: phototropism is when plants move to catch more sunlight, and if a plant is not planted upright, the roots will use gravitropism to grow towards gravity and find water.