I would assume they would be friends if they met in a story-type game (so far the only three games they have met in are sports and fighting games, so there was no interaction between them.) They are both heroes, after all.
It is probably King Boo because not ony did Luigi defeat him in "Luigi's Mansion", Luigi was captured by him in "Super Mario 64 DS".
mario has many enemies,but his worst is the koopa troop and kamek. Bowser is the leader of the koopa troop but its Kamek who is the main minion.
In consoles wars yes, in the game no.
Goombas,koopas,boos, and his biggest:Bowser
no marios brother is luigi not bowser
Marios Leousis was born in 1936.
Marios Leousis died in 2011.
Marios Loizides was born in 1928.
Marios Loizides died in 1988.
Marios Hadjiandreou was born in 1962.
Marios Varvoglis died in 1967.
Marios Nicolaides is 5' 9".
Marios Themistokleous was born in 1977.
You must find these 5 Items: Marios Hat: Washer in the Wash room Marios glove: Projector room Marios Letter: Courtyard Marios Star: Shoot the moon is the observatory Marios Shoe:Twins Room
Marios Kapnisis goes by Google.