When the PokéWalker was first announced, people wondered how a pokémon levelling up would work. Would it be the same as in Day Care, with evolution not happening and moves being automatically learned and replaced?

I can now say from experience that it is NOT like Day Care.

IT'S WORSE.

As with Day Care, evolution does not happen. I put a Weedle in the PokéWalker enough times to get it up to level 7. It is still a Weedle.

Moves, however, also do not happen WTF. I put a L2 Pidgey, who only knows Tackle, in the PokéWalker enough times to get it up to L5, which is when they're supposed to learn Sand-Attack. It did not learn the move. Both of these despite the fact that the levelup is clearly announced and there is an obvious point at which the move-learning and evolution dialogues could have been placed.

Conclusion: Putting your pokémon in the PokéWalker is A BAD IDEA unless you've already completed their moveset or you know for a fact that the next levelup is not supposed to result in a new move or evolution.

In closing, What. The. Heck. PokéWalker.