Doing a code review for me? It's dangerous to go alone, take this:

poketypes.ts

export type tentacool = boolean;
export type umbreon = number;
export type weezing = string;
export type luxray<t> = Array<t>;
export type squirtle<t, t2> = [t, t2]; //tuple
export type unown = unknown;
// eslint-disable-next-line @typescript-eslint/no-explicit-any
export type ditto = any;
export type snover = never;
export type missingno = undefined;
export type PkMnPkMnT = void;
export type wingull = null;
export type crobat = {}; // object

Thanks to @wittekm for ditto = any