Just play hard and level up. Tip- plants aren't very useful, neither are wind monsters, but water and rock are.
Lightning is DLC. Go to the coliseum and beat her to get her crystal just like you would with a normal monster.
Once you beat them you get them
Beat monsters like don't capture them just beat them and they gain exp. BTW i think you can battle your friends monsters. not so sure but yea that's how you train your monsters
l2play n00b
Crystal Palace
The only monsters to beat with a bomb are on Astro Knights Island. (see related question)
1.To team up you have to make an event or call your buddies(if 10 or more buddies are online)2.To beat the monster you have to stand by 1 of the canons and keep clicking until the monster is DEAD
Claire is the final gym leader in Pokémon Silver, Gold and Crystal. She can be challenging, to beat her you could use an ice type.
When you go above the music building you see a olive tree with Athena there. She tells you that music soothes monsters.
its really easy. all you have to do is be and archer and have the triple shot. have alot of magic and you can heal and cast ice on him.
mainly all the hard monsters to beat have those type of things
What I did is beat the first battery mimic and every monster in that room then ran back to the save crystal. When you go back they are not there. You can work through all the rooms in the passage like this. Every time you go back to the crystal you get all you HP and MP back and also any lost members get revived. Also another good point is that if you die then you do not have to fight all the monsters from the beginning all over again. Takes a bit more time but is much easier. Hope this helps.