OS easily, the humor of their antics and banter they would give the twerps always made me laugh (GOD I missed the days everyone (especially Ash) were just almost always savage to eachother can we please bring that back???) and I loved their frequent appearance there compared to XY and such. Unlike XY they never got stale for me there with their constant popping up. I don't exactly mind them being goofballs after the SS. Anna arc because I feel like they shine better as comic relief than not.
Such is why BW Trio really lost their charm in my eyes until later when they were much less serious again. I mean sure I would've loved to have seen the end of that arc in early BW with the Team Plasma thing but that was probably all they had going for them there. I know lots loved their more serious evil on their job side but I prefer them more morally grey ambiguous like they should be and silly and just... you know, fun. They lost their true personality and were just generic insensitive villains, the opposite of what they are. They can be serious sure, I love me some complexity, but keep what makes them charming to begin with. *Ducks under table*
Second VERY close one is SM TRio, something about them there was very charming and made me fall in love with them much more, and I feel like it handled them well. It was nice seeing their comedic chaotic selves really fit in a more light and gag-filled series like SM and I love how they got even a whole episode to themselves in their Z-Ring episode, which I don't think has happened before? Idk, as far as I know anyways, usually you have the twerps be a Side A or B part of the plot. The Z-Ring episode only had Ash for a second. I'd like more episodes like that, it was so satisfying to see them really WIN something all together, and with a fricking honest battle at that instead of the usual "Let's Steal it!" gig. Although I LOVED the Dark Z-Crystal epi with Team Skull too. Also they were practically more of a family in this series than all the rest I think, what with their relationship with Bewear a.k.a JoJo bear mama. Literal overbearing mother and they love her and also mesh well with Stufful too. And the same goes with the relationship with their Pokemon here, which really shine and I think I've gotten rather attached to them like I have Weezing and Arbok, the dynamics between them are solid, and the casual disobedience with Mareanie and Mimikyu is actually rather funny to me unlike Charizard.
I think the only problem with SM TRio is they're very much a "third wheel" there with their frequency dialed down, and as someone who really likes them I feel I have to scrounge epis with them involved, even more in PJ I think. Not to the frequency of XY, not unless they can make them like Kanto and properly involve them every episode, but I'm starved for them GDI. Which is why they aren't my first despite my stronger opinion on 'em.
(Yeah I'm aware another epi focused on them is planned for PJ but then the Pandemic attacked)