I was on the last level of Pinkchu. The first thing I tried was immediately going up to the upper left corner and pushed the blue Pikachu to the Pinkchu. I undo some steps towards the end because I had all the Pikachu with me and they blocked my way to the ball. I first went back to the last Pikachu I picked (the upper-right one), then I tried to formulate the other three Pikachus so that there would be a clear pathway to the ball once I grabbed that last Pikachu. One wrong strategy I tried a few times was having all the Pikachu clustered together. I had a hard time making any progress because I was blocked by the Pikachus. I tried a few times because I was desperate to figure a way out, and I thought you have to have all the Pikachus together in order to win the game. I am not quite sure if there is an intermediate step, but I did move around a lot once I had all the Pikachus with me. Again, I was trying to find a way to the ball and I figure some pathways were blocked but some didn’t. I did work backward several times. Once I was stuck, I always tried to go back to where I came from. Then, I decided to go in a different direction from the past. This strategy did help me a few times. I think there are plenty of ways players can get through this level because it does have lots of free spaces. Overall, I took 1-1.5 minutes to solve this last level. However, I figured out you might not need all Pikachus to complete the level when I tried it again, so my second try went a lot faster.