Well Raichu cant learn Extreme Speed normally so there you go. Thats why its throwing off the alarm
ONLY Extreme Speed Pikachu has it
http://bulbapedia.bulbagarden.net/wiki/Extreme_Speed_(move)
http://bulbapedia.bulbagarden.net/wiki/List_of_local_Japanese_event_Pok%C3%A9mon_distributions_in_Generation_V#ExtremeSpeed_Pikachu