This is a fun math activity which is connected with the idea of Pokemon Go (Get them all). Each students will have a pokemondex and a pokemon card. Students will find each other to write down the problem on their friends' pokemon cards. They will write down the problems, steps of solving, and final answer on the Pokedex sheet. The goal is to get all the problems and correct answers on the Pokedex. First 5 students who get the most correct answers will have a reward which is up to the teacher. I strongly suggest that the teacher should give a limit amount of winners. That will engage students to finish all the problems first and they won't copy from each other since they may loose their prizes.
There are 20 problems total. It means that more than one student have the same pokemon card (if you have a more than 20 students). The teacher has to make sure all the pokemon cards are out there, or they can keep one or two cards as secret pokemons which they will quietly exchange with one of the students in class.
Students are not allowed to exchange the cards. They don't have to solve their own pokemon card, so they can't copy the answer of their friends. To make sure everything is in the control, they are not allowed to yell to find the missing pokemon. They can talk to each other but not yelling.