The cartoons very notably refrained from using their real names, so Peach is regularly referred as "Princess", while Bowser is regularly referred to as "King Koopa". The latter makes it notably simpler to mention that Bowser's cartoon incarnation is King Koopa, and to a lesser extent, the cartoon Koopalings are like that where if you call them by their cartoon names, it's easily understood that it's about their cartoon incarnations. If I have to guess, the change happened before the internet made things less resistant to sudden localisation swaps, so like SEGA can get away with rebranding Puyo Puyo as Dr. Robotnik's Mean Bean Machine and Nintendo to do the same for Kirby's Avalanche. Sonic on the other hand, happened when the internet is blooming, so it was louder to made the dissatisfaction clear.You ever noticed Mario fans don't make as much of a fuss over Toadstool vs. Peach and Bowser vs. Koopa opposed to how Sonic fans make a fuss over Eggman vs. Robotnik?
One year later, we've got the same thing going for Baby Luigi, whom Mario Kart Tour considers to be a separate character from Luigi!Irrefutable evidence that the baby characters are not the same characters as their adult counterparts, as far as sports/kart spin-offs are concerned: in Mario Kart Tour, the recent 1.5 Year Anniversary Challenges that have you perform an action with Mario do not take Baby Mario into account. On the other hand, variants such as Mario (Hakama) and Metal Mario are eligible.
I’ve recorded some footage where you’ll see that the counter of the “Activate Frenzy mode 10 times with Mario” challenge does not increase after getting a Green Shell frenzy with Baby Mario during a race.
Ironically, in Dr. Mario World, the baby and adults are considered variants so you can't use them together in the Skill Summit. For example, you can't use Mario when Baby Mario is the mentor. Yes, that means you can't use Luigi and Baby Luigi together. This makes the Baby Wario challenges trickier because you can't use Wario in them. Not only baby characters are variants, but the fire characters (plus Dry Bowser in Bowser's case) are also variants.One year later, we've got the same thing going for Baby Luigi, whom Mario Kart Tour considers to be a separate character from Luigi!
I'm not going to report this kind of thing for every other baby character from here on out--I just thought a certain member of the Mario Boards may enjoy learning that their "Baby Luigi != Luigi" headcanon is, albeit inexplicitly, an actual thing in an official game.