The best way to evolve a Pokemon is to train them often. If they have evolved to their last state then they can't evolve anymore.
No, Magneton cannot evolve in Pokémon HeartGold.
No
In the Pokemon games Magnetron levels up during game play. This Pokemon will level up at Kalos Route 13 or Mount Coronet.
in Pokemon sapphire poochyena evovles to mightyena
kyogre does not evolve
Spinda does not evolve.
it does not evolve
Sableye does not evolve.
no
no
No, Rhydon doesn't evolve in Pokémon Sapphire.
This question is too vague. There are lots of different Pokemon in Sapphire. They evolve at different levels and in fact, some of them don't ever evolve.