Wow, I'm the only one who voted for Grandleon? That's fine, I guess...Personally I think Masamune is an awesome name for a sword, but it's always given off a katana vibe...I don't know why. Grandleon though, that sounds like some epic broadsword.
You're probably thinking FF7. Whenever I tell anyone about Masamune, that's where they think it's a katana.
Edit: Also, Masamune is the best idea. Otherwise such an epiuc thing is going to turn into a madlib.
With Poo's bravery, and Pie's mind, they become Poopie!
...
C'mon! You know since it's a kid's game someone would be immature enough to do that!
Either that or they'd pick names that make no sense together not realizing they merged into one...
With Flareman's bravery, and Coldbreath's mind, they become... Flaremancoldbreath?