It’s close to the size of the king titan and will self destruct after a short time if it’s not fighting the Alpha version of the king titan also I heard that it takes make mechs to make but only one to pilot once it’s made
You can only use it while fighting the King titan in the Alpha difficulty. You need 4 other meks and the M.O.M.I device to allow to make the Mega mek. You can only get M.O.M.I by beating the King titan in Beta difficulty.
Get four Meks all with M.O.M.I combine the 4 Meks into the mega mek that will self destruct in 30 seconds so hit a Boss with it and it will last a little longer TIP ONLY USE IT FOR FOREST TITAN, KING TITAN, ICE TITAN (if you don’t have a mek with seige cannon.