Should Mew join?

I just got Mew and I don’t know if it should join. If so, what pokemon should I kick off?

my team:
Delta Venusaur @ DeltaVenusaurite
Ability: Psycho Boost
1.Calm Mind
2. Leech Seed

Lucario @ Life Orb
Ability: Inner Focus
1.Aura Sphere
2.Custom Move (Steel)
3.Dragon Pulse
4.Extreme Speed

Gengar @ Black Sludge
Ability: Levitate
1.Shadow Ball
2.Sludge Bomb
3.Dazzling Gleam
4.Confuse Ray

Rotom-Wash @ Leftovers
Ability: Levitate
1.Hydro Pump
4.Ominous Wind

Swampert @ Leftovers
Ability: Torrent
1.Aqua Tail
3.Rock Slide
4.Hammer Arm

Delta Gardevoir
Ability: LightningRod
1.Calm Mind
3.Ice Beam
4.Earth Power

yeet swampert, as its quad weak to grass. You’ve got the 7th gym or 8th gym soon, and i recommend a Magnezone because sturdy is good

not much point replying so late, chances are, they’ve beaten the whole game already