Female Meowstic is highly outclassed by other offensive Psychic Pokemon like
[email protected] and (Mega) Alakazam. Both have better Special Attack and Speed to take advantage of. Given how the Latis need to be transferred via Poke Transfer, I'd use Gardevoir as the Psychic of the team. Take note this one needs Poke Transfer as well, since Hyper Voice is a B2/W2 tutor move:
-Psyshock
-Hyper Voice
-Focus Blast
-Taunt/Will-o-Wisp/Substitute/Calm Mind
Nature: Timid/Modest
EVs: 24 Def/232 SAtk/252 Spe
Item: Gardevoirite
Ability: Trace
Delphox isn't that good in standard play because it's outclassed by Heatran (who has better offensive and presence), Talonflame (which has priority Brave Bird to revenge kill threats), Infernape (better offensive move pool) and even Volcarona and Chandelure, which have stronger offensive presence as well:
Heatran (needs Poke Bank):
-Lava Plume
-Toxic
-Taunt/Earth Power/Roar
-Protect/Stealth Rock/Earth Power
Nature: Calm
EVs: 248 HP/192 SDef/68 Spe
Item: Leftovers
or
-Overheat/Fire Blast
-Flash Cannon/Hidden Power (Ice)
-Earth Power/Flamethrower
-Stone Edge/Ancient Power
Nature: Timid/Modest
EVs: 252 SAtk/4 SDef/252 Spe
Item: Choice Scarf
or
-Stealth Rock
-Fire Blast
-Earth Power
-Will-o-Wisp/Stone Edge/Flash Cannon
Nature: Timid
EVs: 12 HP/252 SAtk/244 Spe
Item: Air Balloon
Talonflame:
-Swords Dance
-Flare Blitz
-Brave Bird
-Roost
Nature: Adamant
EVs: 252 Atk/4 Def/252 Spe
Item: Life Orb/Sharp Beak/Sky Plate
Ability: Gale Wings
or
-Flare Blitz
-Brave Bird
-U-turn
-Tailwind/Roost
Nature: Adamant
EVs: 252 Atk/4 Def/252 Spe
Item: Choice Band/Sharp Beak/Sky Plate
Ability: Gale Wings
or
-Bulk Up
-Brave Bird
-Roost
-Taunt/Will-o-Wisp
Nature: Careful
EVs: 248 HP/8 Def/252 SDef
Item: Leftovers
Ability: Gale Wings
or
-Brave Bird
-Taunt
-Will-o-Wisp
-Roost
Nature: Careful
EVs: 248 HP/252 SDef/8 Spe
Item: Leftovers
Ability: Gale Wings
or
-Swords Dance
-Flare Blitz
-Brave Bird
-Natural Gift
Nature: Jolly
EVs: 120 HP/252 Atk/136 Spe
Item: Liechi Berry/Salac Berry
Ability: Gale Wings
Infernape:
-Fire Blast/Flare Blitz
-Close Combat
-Grass Knot/Stone Edge/Thunder Punch
-U-turn/Mach Punch/Thunder Punch
Nature: Hasty/Naive
EVs: 168 Atk/88 SAtk/252 Spe
Item: Life Orb
or
-Stealth Rock
-Overheat
-Close Combat
-Endeavor
Nature: Hasty/Naive
EVs: 168 Atk/88 SAtk/252 Spe
Item: Focus Sash
Ability: Blaze
or
-Close Combat
-Will-o-Wisp
-Taunt
-Slack Off
Nature: Impish
EVs: 212 HP/4 Atk/252 Def/40 Spe
Item: Leftovers
Ability: Blaze
Volcarona:
-Quiver Dance
-Fire Blast
-Bug Buzz/Giga Drain
-Hidden Power (Ground)/Bug Buzz
Nature: Modest
EVs: 96 HP/252 SAtk/160 Spe
Item: Life Orb/Lum Berry/Passho Berry
Ability: Flame Body
Chandelure:
-Overheat/Fire Blast
-Shadow Ball
-Hidden Power (Fighting/Ice)
-Trick/Energy Ball
Nature: Timid/Modest
EVs: 4 Def/252 SAtk/252 Spe
Item: Choice Scarf
Ability: Flash Fire
or
-Shadow Ball
-Fire Blast/Will-o-Wisp
-Substitute
-Taunt
Nature: Modest
EVs: 160 HP/156 SAtk/192 Spe
Item: Leftovers
Ability: Flash Fire
While Relicanth does have a neat 4x resistance to Fire, its defensive typing is downright terrible because it's weak to Ground, Electric and Fighting, all relatively common attacking types. A 4x weakness to Grass doesn't really help either. If you want a defensive Water Pokemon, you can't go wrong with Slowbro; it's not weak to Fighting like Relicanth is and can take Earthquakes much better:
-Scald
-Psyshock/Ice Beam/Fire Blast
-Thunder Wave/Toxic
-Slack Off
Nature: Bold
EVs: 252 HP/232 Def/24 SDef
Item: Leftovers/Rocky Helmet
Ability: Regenerator
The problem I see with your Sableye moveset is that it's very prone to Taunt. It has to run Taunt itself so that it's not bait for non-Prankster Taunters. It also has to use Foul Play or Knock Off as an offensive move so that if in case it does get hit by Taunt, it can still do something:
-Taunt
-Will-o-Wisp
-Recover
-Foul Play/Knock Off
Nature: Bold/Impish
EVs: 252 HP/252 Def/4 SDef
Item: Leftovers
Ability: Prankster
Jolteon is rather subpar this generation because there are better Electric Pokemon out there that have better utility, like Wash Rotom, Zapdos and both Thundurus formes:
Wash Rotom:
-Volt Switch
-Hydro Pump
-Will-o-Wisp
-Pain Split/Rest
Nature: Bold/Calm
EVs: 248 HP/216 Def/44 Spe (Bold) or 248 HP/216 SDef/44 Spe (Calm)
Item: Leftovers/Chesto Berry
Thundurus:
-Thunderbolt
-Hidden Power (Ice)
-Psychic/Focus Blast
-Thunder Wave
Nature: Timid
EVs: 4 Def/252 SAtk/252 Spe
Item: Life Orb/Leftovers
Ability: Prankster
or
-Nasty Plot
-Thunderbolt
-Hidden Power (Flying/Ice)
-Substitute/Focus Blast/Psychic
Nature: Timid
EVs: 4 Def/252 SAtk/252 Spe
Item: Leftovers/Life Orb
Ability: Prankster
or
-Thunderbolt
-Knock Off
-Superpower/Thunder Wave
-Hidden Power (Ice)
Nature: Hasty/Naive
EVs: 76 Atk/180 SAtk/252 Spe
Item: Life Orb
Therian Thundurus:
-Nasty Plot
-Thunderbolt
-Hidden Power (Flying)
-Focus Blast
Nature: Modest
EVs: 20 HP/252 SAtk/236 Spe
Item: Leftovers/Lum Berry
or
-Agility
-Thunderbolt
-Hidden Power (Flying/Ice)
-Focus Blast/Psychic
Nature: Modest
EVs: 4 Def/252 SAtk/252 Spe
Item: Life Orb
or
-Agility
-Nasty Plot
-Thunderbolt
-Hidden Power (Ice/Flying)
Nature: Modest
EVs: 156 HP/252 SAtk/100 Spe
Item: Life Orb/Leftovers
Zapdos:
-Thunderbolt
-Defog
-Roost
-Heat Wave/Toxic/U-turn
Nature: Bold
EVs: 248 HP/168 Def/68 SAtk/20 Spe
Item: Leftovers
(note that Thundurus and Zapdos need Poke Transfer; the former from Gen V and the latter for Defog, as Defog is a Gen IV TM)