MANAHIVE

Here are equivalent cards to Catapult Fodder (Black Zombies with a similar transform ability tied to toughness > power):
1. Catapult Fodder itself — fits your description exactly.
2. No other existing black Zombie creatures have the exact same transform condition (toughness > power) at the beginning of combat.

Reason: The ability is unique to Catapult Fodder/Barrage, and there are no direct equivalents in black Zombies. Most Zombies care about death triggers or graveyard synergies, not toughness vs. power conditions.