No there is zero chance of it having shadowless cards. @scratchdesk pointed this variation out to me to add to the Identifying Shadowless booster boxes thread ( www.elitefourum.com/t/identifying-shadowless-unlimited-base-set-boxes-packs/16993/1 Its still a work in progress 
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A box with this variation was opened and found to contain 1999-2000 non-holo cards with the regular 1999 holos. It’s a really rare find on ebay though.