Among the 720 species, there's 1 mon I truly dislike; Magneton but I do not despise it as much as this thing:
Let me give you all some insight as to why I do despise this thing. Back when I played Crystal, I used to love collecting mons and shit, normal stuff amirite? Well for the majority of my childhood I had no idea how to evolve an exeggcute into this thing so I never got one myself for a VERY long time. By the time I found out, Diamond and Pearl had come out after I skipped Gen 3 due to loss of interest in the series soon after those came out. Coming back into it, I found on in HGSS and decided to raise it. Most useless piece of shit I've ever used, boxed for Tangrowth once I found that thing.
But the part that TRULY made me despise it came from a Fire Red Nuzlocke I did a year ago. I got to the championship fight with Blue, he sent in his Exeggutor right after his Blastoise falling to my Magneton. Low on health and wanting to spare my healing items, I switched into Pidgeot. Sleep Powder'd. An egg bomb followed. Following the damage roll that did just above 1/3 of Pidgeot's HP in damage, I thought that I could use Wing Attack and then Fly to finish it. Wing Attack brings it to just above half it's health. Egg Bomb is used again. Critical Hit. Pidgeot died. Charizard is sent in and used Fire Blast. It missed. Sleep Powder takes it out of commission and I didn't want to risk it setting up a Light Screen so Primeape is sent in to finish it with a Hyper Beam as it's the only move left on my team that could possibly take it out. Giga Drain is used once. Critical Hit. One Shot. Primeape died. I sent in my Charizard that was put to sleep and use a Poke Flute to wake it up as I only had Hyper Potions left. Exeggutor used Light Screen. It then survived Charizard's Fire Blast and I switched into my Magneton. Egg bomb. Critical hit. Magneton fainted.
In that one nuzlocke, a Pokemon I thought to be absolute trash managed to wipe out half my team and if not for some good luck after the horrible streak described above, I'd have lost to his Alakazam that could now sweep my team on it's own. It made me absolutely despise Exeggutor in general. Fuck this tree.