Some players have been having difficulty getting all the pants required in the Old Navy Challenge.
The first pair of pants are given to you when you begin playing the challenge. Clear the lines and share your result to be awarded the second pair.
Pair number three comes by tickling (or clicking) the robot's pants on the Tetris Battle home page. The icon saying 'tickle me' should appear, but you may have to refresh your window a few times to get it.
Do the Luck Spin everyday to get the fourth pair of pants, and finally, send a request for pants and wait to receive one from a friend for number 5.