While it does fetch a healthy sum, it's nowhere near as valuable as the next entry on the list
Hes only released up to Pharaohs Servant
Then when you attack with one or more Zombies, you draw that many, and then discard that many, and then gain that much life
Electric-type cards in general tend to have lower retreat costs ( Electrode has a free retreat, for instance), allowing you to easily swap out cards as needed, keeping your bench and Pikachu exs attack power at full capacity

Decklist: Odric in Commander Odric, Lunarch Marshal | Illustration by Chase Stone Commander (1) Planeswalkers (4) Gideon Blackblade Ajani Steadfast Basri Ket Elspeth Resplendent Creatures (35) Zetalpa, Primal Dawn Thalia, Heretic Cathar Serra Ascendant Selfless Savior Segovian Angel Oketra the True Mother of Runes Mangara, the Diplomat Lone Rider Healer's Hawk God-Eternal Oketra Gisela, the Broken Blade Fencing Ace Darksteel Myr Crystalline Giant Bastion Protector Baneslayer Angel Avacyn, Angel of Hope Angelic Overseer Aerial Responder Aegis Angel Triplicate Titan Solitude Fey Steed Ambitious Farmhand Chaplain of Alms Welcoming Vampire Loyal Warhound Sunblade Samurai Militia Bugler Skyclave Apparition Deep Gnome Terramancer Danitha, Benalia's Hope Akroma, Angel of Wrath Felidar Sovereign Instants (5) Akroma's Will Unbreakable Formation Swords to Plowshares Path to Exile Teferi's Protection Sorceries (8) Wrath of God Ondu Inversion Mass Calcify Gift of Estates Emeria's Call Austere Command Environmental Sciences Lay Down Arms Enchantments (4) Legion's Landing Darksteel Mutation The Restoration of Eiganjo Felidar Retreat Artifacts (10) Sol Ring Pearl Medallion Oketra's Monument Maul of the Skyclaves Mask of Avacyn Basilisk Collar Moonsilver Key Lightning Greaves Skeleton Key Grafted Exoskeleton Lands (33) Temple of the False God Nykthos, Shrine to Nyx Idyllic Grange Emeria, the Sky Ruin Plains x26 Kor Haven Cave of the Frost Dragon Witch's Clinic Unfortunately skulk isnt really a good enough mechanic to fully build a deck around

Conclusion Trading cards, prominently Pokmon and Magic: The Gathering, are rich in investment potential due to their collector demand, increasing value, and historical significance