Here are my ideas for Water starters. Which one is your favorite?

Aquallet -> Danswan -> Torroyal
Type: Water/Flying -> Water/Flying -> Water/Fairy
Ability: Torrent
HA: Serene Grace
Base Stats:
50/40/55/50/65/60 (Aqualet)
60/50/75/70/85/80 (Swadance)
80/60/95/90/105/100 (Torroyal)
Moveset: Scald, Moonblast, Hurricane, Aromatic Mist, Roost, Hydro Pump, Air Slash, Shadow Ball, Psychic, Ice Beam, Dazzling Gleam

Reaver -> Castruct -> Castorrent
Type: Water -> Water/Fighting -> Water/Fighting
Ability: Torrent
HA: Sheer Force
Base Stats:
54/68/50/45/50/38 (Reaver)
76/94/70/60/70/48 (Castruct)
97/123/90/70/90/60 (Castorrent)
Moveset: Aqua Tail, Hammer Arm, Wood Hammer, Aqua Jet, Slam, Earthquake, Close Combat, Stone Edge, Hyper Fang, Superpower, Crunch

Hibbo -> Aggresippo -> Hydropotamus
Type: Water -> Water -> Water/Dark
Ability: Torrent
HA: Anger Point
Base Stats:
63/65/52/40/52/33 (Hibbo)
83/85/72/50/72/43 (Aggresippo)
115/118/92/60/92/53 (Hydropotamus)
Moveset: Waterfall, Onslaught (Dark - Physical - BP: 120 - Confuses the user after 2-3 turns), Stomping Tantrum, Thrash, Dive, Crunch, Ice Fang, Take Down, Yawn, Slack Off

Baslide -> Aqualisk -> Thassolisk
Type: Water -> Water -> Water
Ability: Torrent
HA: Swift Swim
Base Stats:
45/40/45/55/50/70 (Baslide)
55/60/55/75/65/95 (Aqualisk)
75/80/65/110/75/125 (Thassolisk)
Movepool: Rip Current (Water - Special - BP: 80 - 100% - Switches the opponent out), Aqua Jet, Extremespeed, Dragon Pulse, Skull Bash, Water Pulse, Detect, Agility, Aqua Tail

Platyke -> Platysurf -> Monotorrent
Type: Water -> Water -> Water
Ability: Torrent
HA: Swift Swim
Base Stats:
60/40/50/60/50/40 (Platyke)
80/55/70/85/70/60 (Platysurf)
95/82/90/103/90/70 (Monotorrent)
Moveset: Surf, Aqua Jet, Tail Slap, Poison Jab, Earthquake, Wake-up Slap, Body Slam, Hydro Pump, Mud Shot