GMS v126 - The Chinchillas Invade!

If you read each syllable literally, it's actually Buster. 버 = Buh, 스 = Su (but not like Suu as in Sue), 터 = Tuh

If you want the R sound in there, you would use a ㄹ which is not present.

 Spoiler

Character select screen attached for evidence


My Romanization is pomegranate, but you get the idea. /tired of the It's Buster/Burster arguments

Actually that character select screen shows that KMS's Roman name is spelled with an R.