Here's my preliminary movepool suggestion (may well change during the week). I started out by looking at moves that will allow our Spawn to deal with the weather setup users; Seed Bomb, Superpower and Earthquake do that well, hitting the targets super effectively (Seed Bomb may well be removed, as it may be overpowered). This, however, does not stop the weather, so it would need to run a weather move of its own to properly stop it. Therefore I gave it all the weather setup moves (still on the fence here; may be too far out in terms of flavor). Then, to boost the utility of a team support set that this Pokemon should be very capable of running, I gave it screens, Roar and Dragon Tail to complement its Spiking ability. A setup sweeper is also possible, with either Bulk Up or Swords Dance, depending on what your team needs. I'm right now thinking this may be an overpowered Pokemon, basically the best Swift Swimmer around.. I will be tweaking this and my base stat spread to balance. But here it is, I pulled out some very useful and kind of useful moves, and included the full list of moves at the end.
(Bold means I added them; the rest is taken from Qwilfish.)
Very useful moves:
Spikes
Toxic Spikes
Aqua Tail
Poison Jab
Taunt
Earthquake
U-Turn
Swords Dance
Seed Bomb
Superpower
Waterfall
Circumstantial moves:
Stockpile
Destiny Bond
Roar
Bulk Up
Explosion
Dragon Tail
Reflect
Light Screen
Weather setup moves
Code:
LEVEL UP
- Spikes
- Tackle
- Poison Sting
9 Harden
9 Minimize
13 Water Gun
17 Rollout
21 Toxic Spikes
25 Stockpile
25 Spit Up
29 Revenge
34 Brine
39 Pin Missile
44 Take Down
49 Aqua Tail
54 Poison Jab
59 Destiny Bond
64 Hydro Pump
TMs
05 Roar
06 Toxic
07 Hail
08 Bulk Up
09 Venoshock
10 Hidden Power
11 Sunny Day
12 Taunt
13 Ice Beam
14 Blizzard
16 Light Screen
17 Protect
18 Rain Dance
21 Frustration
26 Earthquake
27 Return
30 Shadow Ball
32 Double Team
33 Reflect
34 Sludge Wave
36 Sludge Bomb
37 Sandstorm
42 Facade
44 Rest
45 Attract
48 Round
55 Scald
64 Explosion
66 Payback
73 Thunder Wave
74 Gyro Ball
75 Swords Dance
82 Dragon Tail
83 Work Up
84 Poison Jab
87 Swagger
89 U-turn
90 Substitute
94 Rock Smash
HMs
03 Surf
05 Waterfall
06 Dive
TUTOR
Aqua Tail
Bounce
Icy Wind
Iron Tail
Pain Split
Seed Bomb
Signal Beam
Sleep Talk
Snore
Superpower
BREEDING
Acid Spray
Aqua Jet
Astonish
Brine
BubbleBeam
Flail
Haze
Signal Beam
Supersonic
Water Pulse
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