i just ran into the most interesting bot in co-op vs ai
(got a 1 day exp boost, and since exp scales linearly with time, i decided to just play bot games and drag them out as long as possible) it was garen, and it was one of those bots that level accounts to be sold. it did a very specific thing that i don't think i've ever seen a bot do before. it constantly, somehow, made the enemy wave slow push. i kept having to go top to clear 3+ cannon waves that piled up, and the garen was the only champ on my team that ever went up there