Say I have for example 2 Galvboss. 1 that is standard, and 1 that is +5. Now I want to Ultra-evolve them into Galvbane.
My question is: If I only evolve one of them, which one does get evolved first? I ask this because there is no option to choose which specific Galvboss you want to evolve.
The +5 one…so just get it to +9 before evolving it to Galvbane…
Ouch, this is what I was afraid of. So that means when evolving Chronozar it will be using the ones that are +9 first? if so then I guess its best to just evolve Chronos first and start over with the galvboss etc
When evolving Chronozar think they will use the lowest one right…not too sure on this…maybe others can help on this…been a long time since I evolve Chrono…sorry forgot about this…><"
He will NOT use your +5 GALVBANE instead he will use the one with lesser bonus. Ex you have 2 galvabane, one is +9 one is +2. The +2 will be used as ingredient, got it? Good
Say I have for example 2 Galvboss. 1 that is standard, and 1 that is +5. Now I want to Ultra-evolve them into Galvbane.
My question is: If I only evolve one of them, which one does get evolved first? I ask this because there is no option to choose which specific Galvboss you want to evolve.
When you use starter as a ingredient for ultra evolve ,the system will automatically opt for the one with lower speed(bonus). It is given in in game instructions 
Say u have 2 galvboss, one is +5 and 1 is standard and u only have 1 moalith and u have the other 3 starters ultra evolved, when u evolve galv it will use the +5, than when u evolve chrono it will use your +5 galv because hes the only one I have seeing as u havent evolved th other one. Only way around it wud be to wait for another moalith