Now that the Luigi's Mansion one is over, I'll make this one. The PAL names are counted as separate names.
Boogie Woogie
BaBoon
Boo Boo
Ooga Booga
MamBoo
Boolean
Booluga
Boo B. Trap
French Boodle
ComBooter
Bootine
Booillon
Boodonkulous
JamBoolaya
Boony Raboot
Boofoon
Booger
Boouncer
ParaBoola
Booldog
Boopa Troopa
Booreaucrat
MaraBoo
Boogie Woogie
BaBoon
Boo Boo
Ooga Booga
MamBoo
Boolean
Booluga
Boo B. Trap
French Boodle
ComBooter
Bootine
Booillon
Boodonkulous
JamBoolaya
Boony Raboot
Boofoon
Booger
Boouncer
ParaBoola
Booldog
Boopa Troopa
Booreaucrat
MaraBoo