Normally for this part, we ask for outside input.  But no one besides us remembers Grune.
Actually, Lynx-O and Snarf have a vague memory of him.  But everyone else was either too young or living off in their own little world.  So we're going to do something a little different.
What are we doing?  I don't think I've heard.
We're taking a survey to find out what the "M" on his helmet stands for.
We'll know once and for all!
I don't believe this.

"Monster"? The Wollos think of Grune as a monster.  Maybe there's a connection somewhere.
*Pumyra*

"Mysterious."  Grune liked to be kind of mysterious and enigmatic.
*Lynx-O*

I bet it stands for "Moose."  The moose is a big animal and Grune was a big Thundercat.
*Wiley Kit*

"Male."  It definitely stands for "Male."  Because Grune was one.  I'm thinking of getting something like that on my uniform, too.
*Wiley Kat*

Possibly "Maverick."  Grune was kind of a loner and liked to do his own thing.  Like me.  I could be a maverick.
*Bengali*

I know for a fact that it sounds for "Mocking."  Grune was always mocking snarfs.
*Snarf*

Isn't it kind of obvious?  Think about it. "Grune the Mighty."  "M" must stand for "Mighty."
*Snarfer*