feat: Add Mythical Island set (#624)

* feat: Add A1a

Signed-off-by: Avior <git@avior.me>

* fix: test failing

Signed-off-by: Avior <git@avior.me>

---------

Signed-off-by: Avior <git@avior.me>

data/Pokémon TCG Pocket/Mythical Island/047.ts

@@ -0,0 +1,44 @@
+import { Card } from "../../../interfaces"
+import Set from "../Mythical Island"
+
+const card: Card = {
+	set: Set,
+
+	name: {
+		en: "Marshadow"
+	},
+
+	illustrator: "kantaro",
+	category: "Pokemon",
+	hp: 80,
+	types: ["Fighting"],
+
+	description: {
+		en: "It slips into the shadows of others and mimics<br />their powers and movements. As it improves, it<br />becomes stronger than those it's imitating."
+	},
+
+	stage: "Basic",
+
+	attacks: [{
+		name: {
+			en: "Revenge"
+		},
+
+		damage: 40,
+		cost: ["Fighting", "Colorless"],
+
+		effect: {
+			en: "If any of your Pokémon were Knocked Out by damage from an attack during your opponent's last turn, this attack does 60 more damage."
+		}
+	}],
+
+	weaknesses: [{
+		type: "Psychic",
+		value: "+20"
+	}],
+
+	retreat: 1,
+	rarity: "Three Diamond"
+}
+
+export default card