Hi,
I’ve already made a Pikachu Card Collection thread, so why not a Wanted thread as well.
As I mentioned in my collection thread, I only focus on all regular sized TCG Pikachu Cards. EDIT: And now also Jumbo Cards! (So this is excluding Pikachu-shaped Dittos, cards featuring Pikachu, Jumbo Cards, stickers, etc. and this does include all languages, stamps, codes, misprints, etc.) Here in this Excel you can see my collection (in green), incoming cards (in yellow) and needed cards (in white).
I’ve also put a Wanted cards list in this thread which might be easier for some. I’ll try to update it regularly when I have new incoming cards. This version below is more updated than my Excel.
So, first of all the quality: My main preference is Ungraded M/NM, but any quality/grade will do, even if it’s heavy played/PSA-1.
All Pikachu Cards I’m still looking for sorted per language:
(Added prices to give an idea of what I’willing to spend for a M/NM copy, but it is of course negotiable. NOTE: Prices are including shipping towards me in The Netherlands.
I’m also willing to buy PSA-graded or played quality cards, but I prefer M/NM ungraded.)
Official releases / main wanted Pikachu cards:
(12500 USD) Promo - Japanese Pokémon Snap Best Photo Contest 1999
(5000 USD) Art Academy - Japanese Farmer / gogotake
(5000 USD) Art Academy - Japanese Business / pikamania
(5000 USD) Art Academy - Japanese Space / Mane Akimaru
(7000 USD) Art Academy - Japanese Pikachu Emotions / Ginga
(400 USD) Promo [25] Flying Pikachu (Flug-Pikachu short print) - German Promo (not to be confused with the German Fliegendes Pikachu, which I already have)
(400 USD) Promo [28] Surfing Pikachu (Surf-Pikachu) - German Promo
(400 USD) Promo [25] Flying Pikachu (Pikachu Volador) - Spanish Promo
(400 USD) Promo [28] Surfing Pikachu (Pikachu Surfista) - Spanish Promo
Unofficial / other wanted Pikachu cards:
(1000 USD) unknown origin Ivy Promo - Japanese Glossy Promo with corrected Keiji Kinebuchi illustrator and off-set Pikachu in the artwork (green circled one at the bottom-left)
(70 USD) Base Set unlimited [58/102] - English ‘Frying Pan’ ink blob error
(225 USD) XY Evolution [35/108] - English Reverse Holo grey ink error
(50 USD) XY Evolution [35/108] - English non-Holo with greyish artwork color misprint (if legit - I’ve seen it once on eBay and at the time thought it was sun discolored on purpose, but unless a fellow Pikachu collector bought that exact copy, there might be more than one in which case I want it)
(20 USD) XY Evolution [35/108] - English non-Holo orange/dark color misprint (on the right)
(800 USD) Base [58/102] (misprint) - English 1st Edition Grey print Red Cheeks (not to be confused with a regular 1st Edition Red Cheeks print or Yellow Cheeks Grey stamp, which I both already have)
(200 USD) Base [58/102] (misprint) - English black/grey 1st edition back stamp Yellow Cheeks (not to be confused with a regular 1st Edition Yellow Cheeks print or Red Cheeks with black/grey back print, which I both already have)
(200 USD) Base [58/102] (misprint) - English white 1st edition back stamp Yellow Cheeks
(250-400 USD depending on the language/version) Base Set [58/102] (misprint) - (any language) Square Cut
(90 USD) Jungle [60/64] - English 1st edition Grey print (not to be confused with the regular 1st edition)
(50 USD) Gym Heroes [81/132] - English 1st edition Grey print (not to be confused with the regular 1st edition)
(200 USD) Ivy Pikachu WotC Promo [1] - English with upside down Italian LPPCOLLECTING - PER 2 O PIU’ GIOCATORI stamp (I already have a regular Giocatori, Giogatori, and upside down Giogatori stamped versions)
(150 USD) Base Set [58/102] with aftermarket “Christmas '99 - Pack 729” stamp - English
(60 USD) EX FireRed & LeafGreen [74/112] with aftermarket “IL RITROVO LEGA POKEMON BRESSO” stamp:
(90 USD) Base Set 2 [87/130] dark orange border error - English
(450 USD) Base Set 2 [87/130] - English Ultra Jumbo (56 cm) Pokémon League Square Cut
(450 USD) Base Set Shadowless [58/102] - English Ultra Jumbo (56 cm) Pokémon London Toy Fair
(450 USD) Base No Rarity - Japanese, signed by Ikue Ōtani (Pikachu voice actress)
(5000 USD) Base - Japanese Solid Gold 20th Anniversary
(400 USD each) Neo Genesis Sample Prints - Japanese (known numbers: 15, 20, 21, 36, 38, 39, 41, 44, 47, 54)
(2500 USD each) Sample Set 1 - Japanese (two versions: both with and without e-reader strip)
(2500 USD) Sample Set 2 - Japanese
(2500 USD) 1995 Alpha Prototype Sample card - Japanese:
(2500 USD) 1995 Alpha Playtest Sample card - Japanese:
(2500 USD) 1995 Beta Playtest Sample card - Japanese:
(2500 USD) 1995 Alpha Presentation Sample card - Japanese:
(3500 USD) Ishihara’s 61st Birthday Ishihara & Pikachu GX Tag Team Promo [??] - Japanese Full Art Ultra Rare Promo
(2000 USD) MTG Base Set Pikachu print test - English
(150-250 USD each) Other Giant Pikachu card used at events - (any language) (these below are just examples)
(40 USD each) Pikachu Vmax Battle Raid Box cards (1400, 2000, and 2800 HP versions)
(25-60 USD) Any Set (misprint) - (any language) Square Cut Misprint
(15-35 USD) Any Set (misprint) - (any language) Any crimped seal error
(10-20 USD) Any Set (misprint) - (any language) Any ink drop printing error
(15-50 USD) Any Set (misprint) - (any language) Any off-center/miscut cutting error
(15-35 USD) Any XY/SM/SwSh+ Set (misprint) - (any language) Any Glossy error
(35-200 USD) other autographed cards (any language)
(price negotiable) Base Set/XY Evolution - Extended/Altered Artwork
Do you know about a Pikachu Card (perhaps misprint) that isn’t mentioned in my Excel yet, let me know (preferably with pictures if possible). If you want to sell one that isn’t on this list, even better. 
I also buy miscuts, crimped, square cut, ink drops, and other misprinted/error Pikachu Cards.
Greetz,
Quuador
except for three:
Two languages (Dutch and Russian) completed, though. I am Dutch, so those weren’t too hard. I already had most before I started collecting Pikachus specifically.