Artist's commentary
Bowser and the rest
It's a sudden whirlwind of Princess Koopa! A big wave of TS!
Afterwards, Princess Boo and various other princesses have been popping up, it's unfortunate I can't tell very well whether they're originally a boy or a girl.
On that point, Koopa's got a rough guy's speech, which with his relationships are fairly strong.
Princess Peach x Princess Koopa or Mario x Princess Koopa or Princess Mario x Princess Koopa are all great.
Incidentally, I dug up a bunch of old doodles, and uploaded them to Pixiv.
・Kukuri
・Luna-chan
・Ai-chan
・Rozeria Sayoyuki
・Life was spared but arm was taken Silver-chan