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>the active Pokemon in Amie follows you on the field
>smaller Pokemon sit on your shoulder/head
>Pokemon too large to be a shouldermon would just follow behind you a la HG/SS
>if the Pokemon is the reasonable size and shape for it the player can ride on it (similar with Skiddo, Rhyhorn, etc in X/Y)
>anything too large (or aquatic) is dropped from this feature altogether to avoid stuff such as pic related