A couple of years ago, I did this challenge with Blastoise on Red, Gold, Ruby, and Platinum, but that progress seems to have been wiped from the front page of the thread (though I still found my posts from that). See post 596 for Red, 603 for Gold, 612 for Ruby, and 644 for Platinum (on pages 24-26 of this thread, according to my posting settings).
Anyway, while that constituted an ultimate challenge back before gens 5 and 6 became mandatory, I recognize that that is no longer the case, so I wanted to pick up that old challenge with Black and either X or Y to officially clear all six generations with Blastoise. So, for the sign-up:
Username: Imperator161
Pokemon of Choice: Blastoise
Challenge: Ultimate
Game(s): Red, Gold, Ruby, Platinum, Black, X or Y (probably Y, but it depends on what I have a extra copy of that I can restart when I get to that point).
Additionally, I want to do a solo run with Pikachu on Red (I have three badges on it so far; I don't have a detailed history of what happened, as it was a while ago, but my Pikachu is currently on level 42, and I have a level 6 Charmander with Cut for HM use). Sign up for that:
Username: Imperator161
Pokemon of Choice: Pikachu
Challenge: Single
Game(s): Red
Update on the Pikachu run mentioned above:
-Defeated Erika, mostly with Swift
-Bypassed the Rocket Hideout and cleared the tower in Lavender using a Poke Doll to run away from the ghost
-Picked up Fly, and a new Doduo to use it
-Cleared Silph Co and obtained a Lapras to use for Surf (too bad I don't have a Surfing Pikachu for this run--Pikachu's moveset is pretty bad right now)
-Opted to catch Snorlax, in case I need the HM capability for anything/want to do anything with it on this file after I finish this solo run
-Obtained Surf and Strength
-Defeated Koga
-Defeated Sabrina (and the fighting dojo next door)
-Defeated a trainer with a ton of Magikarp on my way to Cinnabar, all at level 27 (not sure if this is the "Magikarp trainer" in this game?)
-Obtained the Secret Key in the mansion in Cinnabar, entered the Gym, and defeated Blaine
-Returned to Viridian and defeated Giovanni. Pikachu vs. Rhydon wasn't all that fun, but Body Slam paralysis was on my side.
-Took out my rival with Pikachu on my way to Victory Road
-Traversed the perilous Victory Road and emerged unscathed. Only the Elite Four stands between Pikachu and the completion of this challenge! (I had forgotten just how quick Red was to play through--it's been a while)
The Elite Four:
-Lorelei: Mostly Thunderbolt and Thunder
-Bruno: Rock/Ground Pokémon are the bane of my existence, but I'm too lazy to change Pikachu's moveset, so Body Slam it is. Coupled with Bruno's X Defend usage, I'm probably going to need an Ether or something. Everything else went down smoothly
-Agatha: Thunder and Thunderbolt. Opted to teach Sparky Toxic after this battle to give myself more options moving forward.
-Lance: Mixture of Thunder, Thunderbolt, and Body Slam. (Body Slam for the non-flying types, electric moves for the flying types).
-Rival: Pidgeot fell to Thunderbolt, Alakazam to Body Slam, Rhydon to Body Slam + Toxic, Arcanine to Thunderbolt, Exeggutor to Toxic + Body Slam, and Blastoise to crit Thunder. Victory!
The team:
-Sparky (Pikachu) lvl 72 (Thunderbolt, Body Slam, Thunder Wave, and Thunder) (it essentially looks like something I would have used when I first played RBY, except for Body Slam)
-HM slaves: Charmander (Cut), Doduo (Fly), Lapras (Surf, Strength)
Sparky's final stats:
lvl 72
176 HP
131 Attack
101 Defense
194 Speed
117 Special
Moves: Thunderbolt, Body Slam, Toxic, and Thunder
Screenshots (didn't take them during my journey, sorry about that):