All "Denjū" have a range of statistics (colloquially called "stats"): Hit Points (HP), Speed, Attack, Defense, Denma Attack and Denma Defense. These statistics determine how powerful, fast or robust any given "Denjū" is. The type of habitat a "Denjū" lives in determines how weak it is to attacks from "Denjū" from other habitats; there is a vulnerability chain that goes from Mountain to Sky, from Sky to Forest, from Forest to Aquatic, from Aquatic to Desert, from Desert to Grassland and, finally, from Grassland to Mountain. This also applies in reverse in the sense that a "Denjū" of certain types inflicts less damage upon one it is weak to. However, this was slightly changed in "Keitai Denjū Telefang 2", where "Denjū"'s habitat types are defensive, and attacks are of separate offensive types: Normal, Flame, Thunder, Water, Wind, Rock and Machine. This arrangement makes "Denjū" a bit more versatile, as they may carry moves that would be effective against opponents they would normally have trouble against.