>>28262308can't remember the original one, but more recently I did it with the following on crystal with a phone emulator. All roughly around level 50-45.
>Murkrow>Quagsire>Tauros>Mantine>Gengar>PiloswinePiloswine took down the pikachu easily. Murkrow was my answer to his Venusaur, I could fly and dodge the solarbeam each turn until it died, he also helped tauros with espeon. Gengar dealt with his asshole snorlax by being untouchable and literally running it out of rests. Quag and tauros finished off Charizard. Blastoise was the hardest one by far, I had to use toxic/protect on mantine to take it down.
Overall a fun fight if you're underleveled. I had to actually think up a stratgey rather than just mashing attacks.