No. That's the purpose of the spikes.
The brown is there to make his design look terrible.

But Lucario has always been a Steel type, so the brown parts are quite pointless.

But he never looked like a steel type.

Lucario had Spikes on his hands. I guess that constitutes as being Steel enough for Steel type.

None of the Mega-Evolutions look bad to me per se. I'll have to look at the Stats to have a good idea of how these effects work in battle. The dynamic of Singles, Doubles, Triples and Rotations could change in an instant if these Mega-Evolutions come with new in-Battle Abilities like Drought, Airlock or Aromatherapy.

That aspect of the Mega-Evolutions excites me more so than their visual appeal.

Breeding a good IV Whimiscott to be a Tailwind set-up. I hope I don't go insane after the 60th Egg hatched.

The abilities for the mega evolutions so far have been revealed,

MegaMawile has Huge Power
MegaBlaziken has Speed Boost
MegaLucario has Adaptability
MegaAbsol has Magic Bounce
MegaMewtwo has Insomnia
MegaAmpharos has Mold Breaker

That's going to be trouble. Especially Speed Boost. Dream World Torchic pretty much was a favorite.

Lucario a fighting type I know that for a fact.

Fighting/Steel

Also still mad that eeve gets a fairy type eevelution and still no rock steel fighting or dragon eveelution for him

Yea double checked with a poke red app on my phone