I know Rockruff and Basculian have four abilities, but are there more?
As far I know:
Not counting Mega evolution and Primal reversion
Rockruff (Keen Eye, Steadfast, Vital Spirit and Own Tempo)
Scolipede (Swarm, Poison Point, Quick Feet and Speed Boost)
Chandelure (Flame Body, Flash Fire, Infiltrator and Shadow Tag)
Basculin (Adaptibility, Reckless, Rock Head and Mold Breaker)