Smash Up: Microbot Fixer + Microbot Alpha
All your minions gain +1 power, because they are all Microbots.
From the FAQ,

Q: When a card makes all of your minions microbots, and further then gives all of your microbots strength bonuses, is the effect only local to the base those cards are located or are those effects global?
A: If the text does not reference “on this base” or “at this base” then it is global.

Additionally, the rules explain how to handle Ongoing abilities. Since both the Alpha Microbot and Microbot Fixer's effect are active as long as it is in play, all your Minions are Microbots and they all gain +1 Power, and the Alpha gets an additional bonus equal to the number of other Minions.

Ongoing: Most abilities happen, and then they're over. Ongoing abilities are active for as long as they're in play.