What level can gallade learn signal beam?
Gallade is unable to learn Signal Beam.
Also it is NOT TM (Techincal Machine)
Bellossom cannot learn Petal Dance or Solar Beam via level up in DPPTHGSS. However, Bellossom can learn Solar Beam through TM. Gloom learns Petal Dance at level 53, so if you let it learn Solar Beam, then evolve it. In RSEFRLG, Bellossom will learn both Petal Dance and Solar Beam. Petal Dance at level 44 and Solar Beam at level 55.