There aren't any good Alien Decks.

[SephirothKirby]

[17] MONSTERS

1 x Gorz, Emissary of Darkness

3 x Alien Overlord
2 x Alien Mother

3 x Alien Ammonite
2 x Alien Dog
2 x Alien Telepath
2 x Alien Hypno
2 x Alien Psychic
1 x Sangan

[12] SPELLS

2 x Mysterious Triangle
2 x "A" Cell Incubator
2 x Code A Ancient Ruins
2 x Swing of Memories
1 x Allure of Darkness
1 x Heavy Storm
1 x Monster Reborn
1 x Brain Control

[11] TRAPS

3 x Solemn Judgment
3 x Mass Hypnosis
3 x Planet Pollutant Virus
1 x Mirror Force
1 x Torrential Tribute

[15] EXTRA DECK

2 x Stardust Dragon
1 x Red Dragon Archfiend
1 x Thought Ruler Archfiend
1 x Colossal Fighter

2 x Dark Strike Fighter
1 x Black Rose Dragon

1 x Goyo Guardian
1 x Deathkaiser Dragon

3 x Cosmic Fortress Gol'Gar

1 x Gladiator Beast Gyzarus
1 x Gladiator Beast Heraklinos