Magikrazy said:
When it comes to starring in games:
Luigi gets the short end of the stick.
Baby Luigi gets his side stolen from him and it gets run through a woodchipper.
Does Nintendo hate him?
Sorry if this sounds a bit off-topic.
Let me see for Baby Luigi:
Bad occasions
1st occasion: Gets kidnapped (Super Mario World 2: Yoshi's Island)
2nd, 3rd, 4th, and 5th occasion: His brother is playable, he is nowhere to be seen in those games (Two tennis games, two golf games)
6th occasion: Gets kidnapped (Yoshi Touch & Go)
7th occasion: Gets kidnapped (Yoshi's Island DS)
8th occasion: Didn't receive a trophy while Baby Peach did (Super Smash Bros. Brawl)
9th occasion: Became unlockable while Baby Peach was default (Mario Kart Wii)
10th occasion: Gets shoved in favor of Baby Peach (Mario Tennis Open)
Good occasions
1st occasion: Playable (Mario Kart Double Dash)
2nd occasion: Playable (Mario Superstar Baseball)
3rd occasion: A main star (Mario & Luigi: Partners in Time)
4th occasion: Playable and not unlockable (Mario Super Sluggers)
Gee, no wonder I'm feel so grumpy