Before I post anything, I'll say that while I do believe in character tiers, I don't believe in counter-characters.
As Wolf, Lucas isn't difficult. Most Lucas players tend to try and keep range by spamming PK Fire, so your blaster at long range won't help. However, at close range Wolf can easily dominate Lucas. Use your F-Smash, f-tilt, AAA combo, and blaster to rack up damage. Lucas' Upsmash is very powerful and can kill at fairly lower percents, so avoid approaching with aerials while he's on the ground.