Survive the Zombie Apocalypse

Thanks for the help everyone, I meant specifically. Someone told me that Clobber increases Attack by 50, so I was looking for those kind of numbers. I do now know that Slab is not an insignificant increase, 220XXHP -> 275XXHP and 87XXDEF -> 9999DEF (exactly). That's around 25% for the HP not including %HP sources, but I suspect that it isn't a percentage but some flat amount like 5K that's being influenced by %HP. Anyone else with numbers?

Actual values are
Hothead: 60 speed, 30 jump, 100 avoid
Clobber: 80atk/matk, 50 accuracy
Slabs: 4k DEF/MDEF, 3k HP

All indie, so they stack with other buffs.