Soloing Gengar is so difficult
Hex + Sludge Bomb, Cloudy weather boost, I lost ~40 Potions and Revives combined, along with some Stardust and Rare Candies.
Stardust and RCs weren't an issue, but the problem is I tried 4 times, all FAINTED, relobbying took too much time plus boss regaining HP.
I used a team of Bite/Crunch Tyranitar, SC/ShB Gengar, PC/FS Alakazam, DT/Outrage Rayquaza, Confusion/Psybeam Espeon and MS/Earthquake Groudon. The first 4 Pokémon are around level 30, and the last 2 are around 25.
I dodged 70% of Sludge Bombs across the whole team, but still failed. Groudon wasn't tanky enough to be a very good anchor.
Should I add Steelix or even Aggron to replace the Alakazam/Espeon? Or power up Groudon to another bulk point?
DPS wasn't an issue, I could solo it with like 30 seconds left if my Groudon had infinite HP.
Groudon: level 24.5, IV 15/14/12
Espeon: level 28, IV ??/??/14
Rayquaza: level 28, IV 14/15/10
Alakazam: level 30, IV 15/4/12
Gengar: level 30, IV 13/14/15
Tyranitar: level 29.5, IV 14/15/10
Answers
I use
Genger SC/SB CP 2248
TTar B/C CP 3489
Rhydon MS/EQ 3128
Alakazam C/FS 2695
Alakazam PC/FB 2804
I never have much trouble with it, I only dodge with the Genger and Alakazams and even then I'm not a good dodger. I think you are using the right mons, they just need to be stronger. Use a break point tool to see where you would get maximum help for star dust spent.