Is blissey good

definitly. it has the highest hp out of any other pokemon, including arceus. people who dont use it competitivly probably dont use because it cant deal damage as easly, which in-game, is usually one of the only needed tactics. anyway, if you look at the difference between physical and special, it can deal decent damage and is a good tank/wall. if your not impressed with special attacks, then it can do a lot of indirect damage. if your lucky enough to have leaf green/fire red/emerald, you can teach it siesmic toss, which can do constant damage depending on level. anyway, i suggest teaching it counter, its low defence can be used as an advantage.

ex: you have 600 hp and 10 defence. that means if your hit by a physical attack, then you will probably end upt with 300 hp. counter will deal DOUBLE of the damage from a physical attack, so 600 damage will easily one-shot any thing besides another blissey. then, use softboil and you have 600 h again! although counter can only be used with a physical move, remember blissey was designed to not be phased by special attacks.

ex: another thing you can do is take advantage of the move toxic. toxic poisins the enemy and the poison worsens each turn. if you can keep blissey alive long enough (trust me you can), the poison damage becomes insane.

my blissey has this skill set

ice beam

toxic

softboiled

counter

to teach it ice beam, find it on rout 216 (tm)

toxic is a tm, not sure where it is sorry

counter is a bit more difficult. you need to get a male breloom that knows counter and

breed it with a chansey to get a chansey with counter (worth it!)

it learns softboiled at level 12