Rocky Helmet is a fantastic tool for cards with high burst attack, like Marshadow, or those that chip away with their effects from the bench, like Darkrai and Greninja
This event is available in the following regions: United States, Canada, Australia, New Zealand, Austria, Belgium, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Guernsey, Iceland, Ireland, Israel, Italy, Jersey, Latvia, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovenia, South Africa, Spain, Sweden, Switzerland, and the United Kingdom
I've also added Fabricate as another flexible tutor that usually finds Throne of Geth
Keep in mind Basic Energy cards are not bound by this restriction you can have however many of those types as you like
Use Altaria ex's Ability to keep Wailord's move "Sweeping Charge" dealing high damage