To get a Mawile with ice fang and sucker punch first you need to have a Pokemon with ice fang that is male then breed it with a female Mawile. Breed until you get a female mawile with ice fang.
Then breed a male Pokemon with sucker punch with mawile with ice fang. There you have it,
a mawile with both sucker punch and ice fang.
This is called chain breeding
Note: Before Pokemon x and y only the male Pokemon can pass egg moves, so you can only get a mawile with ice fang and sucker punch on Pokemon x and y