>>48710430This post gave me an idea, if we're interpreting the illusions as being purely (or at least mostly) visual.
>ruse fox going around>find some kid all alone, a perfect target to pull a prank on>make all sorts of illusions>no reaction, no matter how big or obvious they are>realize he's blind>ruse fox begins getting concerned>he hears a voice call out to him, asking where his parents are>he's an orphan, pretty much wandered off and got lost>maternal instinct kicks in and she takes him in>carefully wraps him up in her mane and carries him off, trying to avoid touching him with her sharp claws and scaring him>might not even realize she's a pokemon for awhile