Ah... "Trick Room" likes Quiet - I keep forgetting.
If you were doing RNG-hatching, I'd ask you to do a Weatherball HP Ice Sunnyday Bellsprout.
Since you're catching, though, the goal should be to catch "atypical" pokemon (in HP spreads, or just rarely used pokemon). Oh, and I guess to catch them with fancy pokeballs... since bred pokes can't be in special pokeballs.
I've always liked Krabby (and Beedrill) - I'm just disappointed they're bad pokemon. Of course, if WOTC gave them some better movepools, they might rise a few tiers.
Keep up the good work. If you're ever bored and need a project, let me know. :P