There is only one way to evolve prinplup and that to raise it up to level 36.
Simply I've completed every game with ace my unbeatable staraptor and my starter for pearl was piplup and now is an empoleon.
In Pokémon Diamond, Gyarados will not evolve further.
you have to trade spheres for it
it evolves when you use a shiny stone on it
all you need is a roselia
In Pokémon Diamond, Lileep will evolve into Cradily at Level 40.
Yes, Murkrow does evolve in Pokémon Diamond. After using a Dusk Stone on it, it will evolve into Mismagius.
In Pokémon Diamond, Mantyke will evolve once it levels up while Remoraid is one of the 6 Pokémon in your party.
As of Pokémon Diamond, you can only use the Fire Stone to evolve three specific Pokémon and they are Vulpix which would evolve into Ninetales, Growlithe which would evolve into Arcanine and the normal-type Pokémon; Eevee which would evolve into Flareon.
The underground started in diamond and pearl so there is no underground in crystal.
Lickilicky (sometimes misspelled as Likyliky) is a normal type Pokémon. To get it on Pokémon Diamond you have to evolve a Lickitung.
Grottle is a grass type of Pokémon in Pokémon Diamond, Pearl and Platinum. It will evolve into Torterra at level 32.
There is no specific level to evolve Golbat it will evolve when it's loyal to it's trainer.