Aipom's handling was weird, I can only guess because it Aipom and Ambipom weren't as popular as they hoped it would be.
>Give Ash a new Pokemon towards the end of Battle Frontier and have it follow him to Sinnoh because it has a new evolution coming in Gen 4
>Despite this, the evolution doesn't even happen until after Ash trades it to Dawn for Buizel
>Then gets written off to go play ping pong instead
