WARNING: Long winded, possibly spurious and off topic rant ensuing from this point:
May I remember doing a bit of slapstick, she also got into peril more times than the other Pokegirls, usually in humiliating ways like TR tying her up and dangling her on a branch or a Caterpie mummifying her. While not without her plot armour moments, I also remember her being allowed to lose or struggle for things more routinely than the XY-onwards females along with her flawed nature being demonstrated more thoroughly (eg. chewed out by judges for pushing her Bulbasaur).
There is a fallible nature to the female companions I think is lost XY onwards, like they don't like showing their ugly side too much or seeing them get dragged through the mud. They have more endearing flaws like timidness or low confidence and they tend to avoid putting them in situations they really make an ass of themselves. Sometimes I feel like they shifted most of the females out of battle focus because it is an agenda that requires too much violence and mandatory losses (and even then they wanted us to believe Serena's 'bubble wrapped' battle run put her on par with Ash in the end). Mallow and her Pokemon have been revealed to have a temper for example, but it's not been shown to have the same detrimental consequences as Kiawe's team at times, or even Ash's, or when it does cause harm it's for someone else with them never put on the spot for it (eg. Bounsweet almost getting Rowlet and Popplio killed and ASH getting blamed for it). It's not a developed flaw. Many were also very critical of the anime castrating Lillie's backstory with her mother into something far more mundane, and while the phobia arc balanced it a bit, it was kinda solved too easily through contrived circumstance.
Notice the same thing occurred in XY, Clemont was sidelined as much in the last half as Serena was in the first, but Clemont seemed to make more use of the opportunities he got, gaining more character agency through his strengths and weakness (weak physical power, but tech smart) and generally feeling like he got more challenges or unique team play with the main character, while Serena was mostly restricted to internal development, otherwise only allowed to contribute in rather bare bones one sided affairs like Team Rocket which didn't really develop a specific niche among the team, even her own competition arc felt tailor made so she'd be head and shoulders above everyone else without needing to improve. You had to feel for the beatings or 'worfings' the likes of Bunnelby took for the team as well, while Braixen and Sylveon seldom took a hit outside to inflict a plot armour boost, even when they wanted to sell the opponent was dangerous. Even concerning her crush, Serena had a ridiculously perfect version of Ash she seldom had conflicts and hardships with, the one time she did they tried to make Ash the one in the wrong for once. Serena just felt more off limits than Clemont did.
I think this is maybe why Ash, Kiawe and Sophocles are allowed to stick out more in SM, because the more open opportunity for both positive and negative makes them way more versatile and more capability for creative contributions and foibles, while the females, besides the occasional gag or bit of light slapstick, tend to be sidelined outside more basic, harmless affairs so don't develop as much character agency as the boys. Lillie is the nearest to an exception, similarly having the 'frail brain power' role Clemont had. Generally a well rounded character needs a mix of winner and loser qualities, competent but still vulnerable, and it has to be demonstrated so the character can develop a position for themselves.