When we first started out journey with this project, we decided to take a peek at the biggest halo in the IllustrisTNG simulation. The first time that we visualized it marked a memorable moment for all of us not only because we were looking at the most colossal dark matter structure produced by this highly realistic suite of simulations, but also because this was our first meeting with our beloved friend, the "Pokemon", who has been an inseparable part of our project ever since. The reason it got its name is the peculiar shape that it has. It seems like one can almost discern a little body, a head, a tail, ears and even feet. This irregular shape was the first indicator of some potential issues with the Friends-of-Friends finder.