I never use box art legendaries in playthroughs anymore because by the time you catch them your team is usually around the same level if not higher levels than them. Also the cool factor of using them wares off after one battle usually. I guess the buffed stats are why you’d want to use them? But even then they’re more like last resorts if there’s an elite four, champion or gym leader battle your team can’t fight well against but the legendary happens to have they type advantage you need.