When you get stuck with what to do call on Mechanic Pig and it will instantly build the best possible vehicle for a specific puzzle. You'll still need to ferry the pig to the end of the stage while reaching the assigned goals.
You can score three Mechanic Pigs by liking Bad Piggies on Facebook. When those run out, buy more via in-app purchase:
10 Mechanic Pigs: $1.99
35 Mechanic Pigs: $5.99
65 Mechanic Pigs: $9.99

Embark on an inspiring mission of human connection beyond the UCA. Sam — with companions by his side — sets out on a new journey to save humanity from extinction. Join them as they traverse a world beset by otherworldly enemies, obstacles and a haunting question: should we have connected?