No. He/she never evolves.
Barboach evolves into Whiscash.
yes ask the owner everyday at the Pokemon mansion he'll say which Pokemon he met
Catching Minun is relatively easy though finding it might take a bit of time. Minun can be found in the Trophy Garden of Pokemon Diamond and Pearl. It also appears as a swarm on Route 6 on Pokemon White. And finally Minun appears on Route 5 of Pokemon X and Y.
Sorry No. They do not evolve. Although they have less than .0000005% of a rate of at least being seen let alone caught.
The Charzard evolves into a Charmander.
Likitung
evee
drifloon
Barbaroach
Ponyta evolves at Level 40 in Pokemon diamond.
Minun is an Electric type pokemon.
Chansey evolves from an Oval Stone.