Runs in a Swift Playground, even on macOS 10.14!

SwiftUIDemo.swift

import PlaygroundSupport
import SwiftUI

struct Pokemon {
    let dexNum: Int
    let species: String
}

extension Pokemon: Identifiable {
    var id: Int { return dexNum }
}

struct SpeciesView: View {
    var species: Pokemon
    
    var body: some View {
        HStack(alignment: .center, spacing: 0) {
            HStack {
                Text(String(format: "#%03d", species.dexNum))
                Spacer()
                Text(species.species)
            }
        }
    }
}

struct MyView: View {
    var items: [Pokemon]
    
    var body: some View {
        List(items, rowContent: SpeciesView.init)
    }
}

let pokemon = [
    Pokemon(dexNum: 1, species: "Bulbasaur"),
    Pokemon(dexNum: 4, species: "Charmander"),
    Pokemon(dexNum: 7, species: "Squirtle"),
    Pokemon(dexNum: 25, species: "Pikachu"),
    Pokemon(dexNum: 133, species: "Eevee"),
    Pokemon(dexNum: 150, species: "Mewtwo"),
    Pokemon(dexNum: 151, species: "Mew"),
]

PlaygroundPage.current.liveView = UIHostingController(rootView: MyView(items: pokemon))