1. Use Poxie Minion from chapter 4-1. A little Friend + Get a Minion (2 achievements)
Thanks to: DANIELJJ14
2. Buy Rare Metal Minion from: Store > Rare Metal Store.
3. Select Poxie Minion in Boost Minions to level up :
(Game Home
Customize > Minion Menu> Boost Minions.)
4. Sacrifice the Rare Metal Minion and Poxie Minion will be Max. level. (2 achievements)
5. 4 achievements unlocked, Bottoms up ;)