Watch the Tournament
Notes & Combos
Memento is a very cool deck, but at the moment I dont think can compite with the other decks in the META, specially right now when most of the META decks are running +12 handtraps.
Your end board is "S:P Little Knight" + "Tecuhtlica" with "Cranium Burst" and/or "Mementotlan Fusion"/"Fracture Dance". (Chimera 1 or 2 pops, Fracture Dance 1 pop). Always try to end with "Agwitch" in your hand or GY. So you can special summon it in the opponent turn and search "Mace" for a (Quick) Change of heart.
The deck really struggles aganist Maxx "C", If you get Maxx "C", try to search "Fracture Dance" and/or "Mementotlan Fusion" in the less posible summons and pass, you really dont want to play the challenge.
The deck is bad goind second, the space is to tight to put board breakers. But I tried "Droplet" and works really well, even better if you can summon "Tecuhtlica" and go for an OTK.
About the ratios... Most games Im fine with only 1 "Tecuhtlica", aganist Kashtira is where I find you need another one. Speacking of Kashtira, since "Kashtira Unicorn" is quite popular in Snake-Eyes, I run 2 "S:P Little Knight". I think 2 Memento Fusions, 1 Chimera and 2 "S:P" are mandatory.
I didnt tried it and if I read it correctly, "Abominable Unchained Soul" and "Meklord Emperor Wisel" can trigger of your Memento cards, Its worth mention it, but I dont think is viable.
Replays
Shout outs to: Triple Tactics Tim
For the combo guide https://youtu.be/0xlGNaXzXio?si=tLBl2ACwwRjumjA9
ID:476-952-493
Aganist Snake-Eyes Goind Second
Note: In the replay, the oppenent miss-play in not bring it "Link Kuriboh" when he summons "Ash", "Oak" of the "Flaberge".
Top Secret & Selection Packs used

Run Spright Elf. Hold your Ghattic recycle effect until you link it off into Elf, then re-summon ghattic and get the recycle effect (cards dumped by Goblin usually, and you can end your board with Elf pointing to I:P and Combined Creation with set Cranium Burst, all with one Angwitch, and during your opponent's turn, summon Ghattic with Elf to add one of your handtraps (Goblin or Mace) from GY. The general idea is that you always want to left one of the handtraps in the GY to recycle with Ghattic during opponent's turn and add another one using Angwitch summoned by Combined Creation. THen after that you can either link your I:P into 3-material Appo OR S:P, dependingon your plays.

probably not, its 2 cards and they usually release those pretty late in the pack cycle sadly.

Congrats brother! I am currently trying to take memento to m1 (currently m3 ) , def happy to see other memento chads doing well

I was waiting for the first decklist of this deck and it's perfect except just the 2 sp, is it necessary to play 2?

I know, it hurts see a double S:P, but i think its 70 % mandatory In the beggining i started running only 1 S:P and 1 Apollousa, but Apollousa never come up a single time and as i mention with Kashtira Unicorn, the opponents always get rid the S:P Another case that I feel I need the second S:P, is when I go fist and I get "Ash Blossom" or "Imperm" and have two boddies I go for S:P / Pass, but in my follow turn, I dont have nothing to go into to push into their boards or protect me into Nibiru, the deck at the moment cannot put a ton of boddies in the board at the same time like Snake-Eyes do, so your links 2 are your best friends. Try runnig only 1 "S:P" and 1 "Relinquished Anima" and tell me how woks for you. :D