Fly-Trap Grass-type Physical attack Is treated as super effect against Bug-types rather than not very effective.
Frostbite Ice-type Physical attack Does damage and lowers the target's Attack and Speed by one stage each.
Jaws Water-type Physical attack Does damage, and opponents of lower height and weight are "swallowed" for 1-3 turns. Neither the user nor the swallowed target can make any moves or be withdrawn, and the swallowed creature cannot be targeted by trainer items.
Jaws of Life Steel-type Physical attack Does double damage if the user is currently subject to a trapping move or ability.
Vampire Ghost-type Physical attack Does damage, and the user restores HP equal to half of the damage dealt.
Kinda funny you mention that, cause in the show (at least in my memory correct me if I'm wrong) when Ash fought Jasmine, and Jasmine had her Steelix use Crunch, it didn't bite, it 'crunched' it's jaw down on Ash's Pokemon, it didn't bite them.