Does anyone have any tips on leveling a higher level poke? My golurk is almost 5k and I would like to find a quick way there. Any help is appreciated.

ask people like grim reaper or mikehappy for training. Hope this helped you. My poke is almost 5k too.

Toxic is used on the opponents/NPC with higher levels.
It's a quicker way to get Experience and level up quicker.
It's cost 4500 coins being the downside.

Otherwise, this:
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Or I can help you train if you like just ask anytime. I will do it for free I don't need coins they are useless in my world.

I think as far as I know... you have to fight the Dark Alley trainer. Apparently Toxic is what you need but I don't really get why. Hope somoene answers, I'd like to know as well as I'm close to 3.2k!

Tag- Toxic is needed because it help lower the other team pokemon hp by 10% every turns it takes, in which help defeat the pokemon faster before it defeat your whole team.

Ahhhh!, thank you! I figured it had something to do with that but I get beat so hard I didn't think it'd make any difference. I'm one hit K/O'd typically...lol!

Another tip, use Golurk/Golett/Jellicent. Their typing makes it a lot easier to survive longer and train.