In story mode, when you reach the Cell Game, the Cell Jr.'s will gang up on characters for their Meteo attacks if you have two or more of the following characters (Piccolo, Vegeta, Kuririn, or Mirai no Trunks), in play at a time with a Cell Jr. highlighted as the target opponent. If two Cell Jr.'s are in play, the Meteo will be a Cell Jr. on each side of the opponent firing a KameHameHa. If three Cell Jr.'s are in play, the Meteo will be all three Cell Jr.'s firing KameHameHas that combine into a large beam and hit the opponent.