when people say they like the M&L RPGs, what they usually mean is that they like bowser's inside story - cause most of the other ones aren't that remarkable (sorry dream team, ily). superstar saga's aesthetic value is what kept me invested - the game's got a good sense of humor, and the spritework makes me miss looking at flipnote studio when i was 9 years old. advance attacks are also pretty satisfying to pull off, once you know what you're doing.
other than that though, it's not too interesting. bros attacks are way less plentiful and flashy compared to other games, the game was overall too easy (other than cackletta soul and that fucking crab, along with some bullshit attacks you're expected to defend against), and playing this on a regular GBA with no backlight didn't feel great. it's decently fun, it's got value, but it's not something i'm ever gonna come back to.