Quote Originally Posted by Geodude
Marshtomp is an unsurprising choice to learn Protect though, since it learns it naturally anyway.

And Ash's Snorlax knows Protect, but you probably meant those in the main team.
You got it.

What I was refering to was that Corphish, Torkoal, and Glalie all learn Protect naturally as well, so what stopped them from learning it? Especially Glalie, as it has no protecting move while Torkoal has Iron Defense and Corphish has Harden.