>>33697744Pikachu will die like a bitch to Earthquake. If it uses Charm then you will probably need two turns to kill it, otherwise it should be a OHKO.
Espeon will get walled by a Dark-type, otherwise Psychic will tear through your team. Reflect can be pretty annoying if it stays up after it faints.
Snorlax gets walled by Rock-types. It has a high Special Defense that can be boosted even further with Amnesia, so rely on physical moves. And it can heal itself with Rest so it will probably be a long battle. I've found that Rock Smash is useful in lowering it's defense stat, then you can kill it quickly before it has a chance to use Rest again.
Venusaur, Charizard and Blastoise all hit very hard when you're a low-level, even when you send out a Pokemon that resists their moves. Paralysis helps because it allows a wa
Venusaur has one-turn Solarbeam than even hits anything hard and it can also heal with Synthesis. Something that resists grass and has high special defense is very useful here.
Charizard's movepool should be walled by Rock-types but most Rock-types have low Special Defense so Flamethrower will still hit hard (especially if Sunny Day is still active). Although being x4 weak to Rock does make it easier to handle. Alternatively a Water-type with good Special Defense should be useful against it.
Blastoise can hit water-types hard with a rain-boosted Surf and Blizzard seems to be much more accurate than it should be, which makes Grass-types useless against it. Lanturn is probably the best Pokemon to deal with it since it resists and benefits from Rain Dance with 100% accurate Thunder and boosted water moves.
Overall, it shouldn't be too difficult. I managed to beat him with a team under level 50 and I didn't even have a Dark-type, an Electric-type or a Rock move. Although I did have to rely on spamming Flash to lower his accuracy for Espeon and Blastoise. But if you have enough revives and hyper potions then you should be fine.