>>57713794252 SpA 30 IVs Houndoom Dark Pulse vs. 4 HP / 0 SpD Alakazam: 266-314 (105.5 - 124.6%) -- guaranteed OHKO
252+ SpA Cacturne Dark Pulse vs. 4 HP / 0 SpD Alakazam: 302-356 (119.8 - 141.2%) -- guaranteed OHKO
172 SpA Gengar Dark Pulse vs. 4 HP / 0 SpD Alakazam: 190-224 (75.3 - 88.8%) -- 6.3% chance to OHKO after Stealth Rock
252 SpA Life Orb Gengar Dark Pulse vs. 4 HP / 0 SpD Alakazam: 260-308 (103.1 - 122.2%) -- guaranteed OHKO
252 SpA Choice Specs Latias Dark Pulse vs. 4 HP / 0 SpD Alakazam: 266-314 (105.5 - 124.6%) -- guaranteed OHKO
Alakazam still gets OHKOd by would-be special sucker punches (Dark Pulse has same BP in Gen 4), except now a teammate can't halve their damage with burns.
Also Shadow Ball/Focus Blast > Meme Punches.
If you want to hit Dragonite really badly, you can just use HP Ice (Only 5 BP less in Gen 4), which is better anyways because it doesn't make contact.