This means a Pokemon will evolve during a trade some example Pokemon that evolve during trade are: Haunter, Graveler, Machoke. There are plenty more than that so keep trading.
it means that it does not want to evolve
The word 'evolve' means change.
Trading a Pokémon to evolve means trading a Pokémon to someone else in order to evolve it such as Kadabra only evolving into Alakazam when it's traded.
It means to evolve, or change their ways, to survive in the habitat they are placed.
That means your Pokemon must be loyal to its trainer or it must like its trainer a lot in order to evolve. To do that use items on your Pokemon, train it a lot.
you mean qwilfish, well it does not evolve
If you mean Igglybuff, you evolve it with friendship.
It will evolve by happiness that means always let it fight never let it faint and soon it will evolve :)
Golbat will evolve if it has max friendship with its trainer which means it can evolve at any level.
...it doesn't evolve & i suppose you mean sudowoodo.
If you mean Magneton, it can't evolve any more
If you mean can you evolve murkrow in fire red, then the answer is no.