2026 Topps Series 1 Baseball Celebration - Mega Box

The 2026 Topps Series 1 Celebration Mega Box is Topps' Opening Day-aligned retail exclusive — introduced in 2025 as the spiritual successor to the standalone Opening Day set — layering mascot-themed content onto the standard 350-card Series 1 base set. At $49.99, each box (14 packs × 14 cards) delivers seven insert sets and four Confetti parallel tiers found nowhere else in Series 1 — not in hobby, blaster, or standard mega formats. Pink Confetti (/100) and Lime Green Confetti (/50) are the most-chased numbered base parallels. New for 2026: Hidden Mascots short prints (1:800 packs), where team mascots are concealed in card backgrounds — the toughest non-hit pull in the box. On the hit side, Mascots Dynasty Autograph Patch cards serial-numbered /10 (with new MLB Logo 1/1 variants) are the apex chase. The 8-Bit Ballers pixel-art inserts and Dugout Peeks candid photography round out a checklist that's entirely unique to this SKU. Browse the full Celebration Mega Box checklist and find available copies on eBay below. This checklist contains only the content exclusive to this box, beyond what's included in 2026 Topps Series 1. https://www.halloflists.com/products/2026-topps-series-1-baseball