
Pokemon players come up with the neatest challenges, as there's the Nuzlocke challenge, the no-catch challenge, and so many more things to keep you busy once you're tired of beating the game. One challenge the most dedicated players like to partake in is building a Living Pokedex.
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This means that they've not only caught all the Pokemon through all the games, but they have them organized (usually in National Dex order) in boxes. There's also the All Forms Living Pokedex, which requires you to have all the forms of a Pokemon. Unfortunately, this challenge is made difficult by the inability to access some Pokemon.
8 Pumpkaboo And Gourgeist
The first challenge with Pumkaboo is getting all the sizes, as Pumpkaboo comes in four sizes: Small Size, Average Size, Large Size, and Super Size. You'll spend a while wandering around trying to find the sizes and then catch them because their spawn rate varies, and maybe you'll get RNG on your side, but then again, maybe not.
Then you'll have to evolve it into Gourgeist, and like Pumpkaboo, Gourgeist has four sizes based on the Pumpkaboo it evolved from, and can only be evolved by trade. Evolution by trade has been the bane of lonely players since the first generation, but luckily, the Internet is full of people with the same goal as you.
7 Unovan Monkeys, Tepig, And Snivy
Hopefully, you can find your 3DS for these, as the elemental monkeys Pansear, Panpour, and Pansage, along with the fire starter Tepig and grass starter Snivy, are among the few Pokemon who aren't available in any Switch game.
That means you'll have to break out your 3DS to get Tepig or Snivy, catch the monkeys, transfer them to Pokemon Home, and then restart to get the starter you didn't choose before. Unless, of course, you have both Pokemon Black & White — then you can get one starter in each game.
6 Minior
Minior is only available in Pokemon Sun & Moon. No problem, you say? Do you have Pokemon Home? Great! Now catch its Meteor form and all seven of its Core forms - red, orange, yellow, green, blue, indigo, and violet.
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While Minior has anywhere from a ten to forty percent spawn rate, you could still spend a long time walking around, trying to chase those colors down, only available in Mount Hokulani. Not impossible, and certainly doable with time, but you'll need a lot of patience.
5 Antique Sinistea
via theflamelord/RedditSinistea, introduced in Generation Eight, has two rather unique forms, which aren't based on where they are or what game they're in, or the time of day they spawn. The two forms are phony and antique, and they look almost the same, except that antique Sinistea has a stamp of authenticity on it, and phony Sinistea doesn't.
Sinistea already only has a one percent spawn rate, and the chances of getting an antique Sinistea are even lower. You can't breed for an antique Sinistea either, so your only chances are finding one in the wild, or getting very lucky during a surprise trade. The odds are not in your favor.
4 Glastrier And Spectrier
These legendary Pokemon are available at the end of The Crown Tundra DLC, but you can only get one of them. You must obtain either the Shaderoot Carrot or the Iceroot Carrot during your journey through Crown Tundra, and the associated horse will appear. While the catch itself isn't overly difficult, you can't catch both in one run.
You'll have to catch one, transfer it to Pokemon Home (or a trusted friend), and go back to before you started Crown Tundra (which means you can't save), or play it on another user profile. Then you run it again to catch the one you didn't get the first time. Low difficulty, but it requires time.
3 Alcremie
While Alcremie is cute, it may be an example of Pokemon forms going too far with a whopping 63 total forms, which aren't unobtainable, but extremely time-consuming. When evolving Milcery, you need to have sweets and creams that you can obtain throughout the game.
You must also pay attention to which way you spin, how long you spin, and even what time it is because Game Freak certainly got creative with the evolution techniques for this one. Happy hunting and spinning!
2 Vivillon
While Vivillon isn't incredibly rare by any means, collecting its 20 forms can be a challenge. In Generation Six, the wing pattern depended on the real-world location registered on your 3DS, and you couldn't change your location mid-game to try and get another form. Generation Nine Vivillons all come with the Fancy Pattern, but Pokemon Go offers a way around that.
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If you send yourself a postcard from Pokemon Go using Scarlet's and Violet's mystery gift, it will change the patterns to fit the region that the postcard is from. You can use one postcard per day, and it won't affect any Scatterbugs or Sewpas you already have in boxes or your team, as those already have their final evolution forms baked into their code. This makes Vivillon a little less impossible, but time-consuming.
1 Furfrou
This furry dog Pokemon is a friend to all — as long as you don't play on the Switch. Furfrou, like a few others, currently has not made any appearances in the Pokemon Switch games, which already makes it a little more difficult, but its ten forms are what present the real challenge.
Its ten forms are only obtainable either through events or traveling with Pokemon Go, which is hardly feasible, and an All Living Forms Dex might just be a pipe dream until there's a better way to get Furfrou's various forms.
NEXT: Pokemon: Every Eeveelution, Ranked