Hi
Can mounts be like a feature and not an item with abilities rather than land, surf and flying mounts
Land mounts can be for fast transportation on land
Abilities
running on hard surface
Surfing on/in soil, desert areas
Dig into ground go underground
Fluid mounts
Water mounts for surf, dive, waterfall
Air mounts for fly to go up or down, glide to float
A Pokémon can be mount based on its size and weight and ability to carry players
A Pokémon if eligible to mount can be land, fluid or combination of both based on its ability to learn certain moves which include but not limited to surf, dive, waterfall, fly, dig
Hope you ignore my language and Grammer