Gallade is unable to learn Signal Beam.
Also it is NOT TM (Techincal Machine)
Level 42.
Ariados does not naturally learn the move Signal Beam in Pokemon Emerald. If bred with Venonat, Venomoth, or Volbeat however it will learn Signal Beam.
Zoey's Gallade has used Magical Leaf, Psychic, Signal Beam, Psycho Cut, Swords Dance, and Vacuum Wave.
Lv42
dragonair can learn ice beam any level
It doesn't learn Ice Beam by level. It is, however, able to learn it through the use of the Ice Beam TM.
Breed is with an Ampharos(male), Ampharos learns Signal Beam at level 57 and they are compatible
Lapras will learn Ice Beam at level 31.
it does not learn ice beam in a particular level, but you can teach with TM13 ice beam.
It doesn't learn Ice Beam by level up. It can learn it by TM13 in all generations though.
no it can not learn it but you can get ice beam as a TM is number 13
Pikachu doesn't learn Charge Beam via level up however it can be taught Charge Beam via the Charge Beam TM.