Did the In Order Challenge in Yellow, which meant 3 starters + Butterfree
Butterfree was solid in the beginning but lagged by the end and the rest was decent enough, as expected. Venusaur was the least useful of the three starters, but after it got Razor Leaf (and later Toxic + Leech Seed) it managed to hold its own pretty well.
I had to grind a bit to deal with Lorelei but we more or less first tried most other trainers. By the time I got to Blue though, I was tired so I just dumped Rare Candies, X-Speeds and an X-Accuracy on Charizard and just used cheap Fissure strats to sweep Blue (really should have gotten a flying type there, bud).
6 / 49
I might finish off the Kanto row soon, since all I'm missing is a pretty simple challenge and Kanto runs are fast.
Finished off Kanto with Love at First Sight on Fire Red.
I used the starter, got a Spearow at Rt. 22, a Diglett at Diglett Cave and a Voltorb at Rt. 10.
The team was a lot frailer than I'm used to but it was useful enough in general. The only one that lagged a bit was Electrode, because it had a crappy moveset and I wasn't going to gamble for Thunderbolt.
Electrode dealt with Lorelei, Fearow + Blastoise dealt with Bruno, Fearow + Dugtrio dealt with Agatha, Blastoise dealt with Lance via Blizzard and all together they dealt with Blue. Ironically Blue was the easiest trainer in the E5 rush.
With this I'm done with all the Kanto challenges and only have 42 more challenges to go!
Final thoughts on Kanto:
Not suited for a lot of these challenges, since it usually has a terrible distribution and not great movepool. On the other hand, Gen I has terrible trainers in general so you can do these pretty quickly.
If you're reading this and thinking of what to do for Kanto, I'd recommend ROM Hacks. Doesn't even have to be something radical like Radical Red ([i]ba dum tss[/b]), just something with more challenge and choices to it will probably work out nicely.