a good website to go to for evolutions, moves, and tm's it can learn is atwww.seribii.com
This does 2 things; 1, tells you how powerful Return/Frustration is, and 2, some Pokemon evolve through max happiness after you level them up, so it tells you if that Pokemon would evolve.
look up the Pokemon on wikipedia or visit http://serebii.net/pokedex-rs/ for a pokedex
It evolves on LV30.. Heres a link to a pokedex thingoo that tells you what levels Pokemon evolve on & what moves they learn http://www.serebii.net/pokedex-dp/
No, but there are handbooks that tell you aswell
Level up your Pokémon to Level 18 or higher, and then go to Luminous Springs after Manaphy tells you the location of the Marine Resort. This will evolve you into Croconaw. To evolve into Feraligatr, level up to Level 30 or higher and go to Luminous Springs (after Manaphy has told you the location of the Marine Resort, of course).
Check out serebii.net it's really useful, it tells you everything about a Pokemon and the games
Level it up during daytime after increasing its happiness level. I believe there's a lady you can talk to in Northeast Goldenrod City that tells you the happiness level of the first Pokemon in your party. You can easily increase a Pokemon's happiness level by using items on it, especially vitamins (Carbos, Protein, etc.) It just takes a little time.
I'm not sure how to make it happy enough to evolve but it's simple... just give it all of the items that look like baby food cans, and go to the lady in golden rod city that tells you if your Pokemon love you and if it does level it up and it will most likely evolve.
When you defeat Primal Dialga, the Pokemon can evolve except Starter and Partner after you cleared Mystifying Forest.Starter and Partner evolve when Palkia is recruited at Spacial Rift and Manaphy tells you about the Marine Resort.
The tree tells you what level your entralink is. The taller the tree is, the higher the level. Also, the white branch tells the whit level, and the black branch tells the black level.
it all depends on what pkmn your talkin about. on serebii.net, it tells you when EVRY Pokemon evolves
use a shiney stone for more information visit www.serebii.net this site tells you heaps about Pokemon