I can't believe I actually did it! Regirock is my favorite of the three, and it was definitely the most fun of the three to build (Regice was easily the most challenging build) because Lego made pieces that fit his design perfectly! The shoulder boulders, the geode spikes on his back, his clobbering rock fists, and all the tile pieces that make his body look jagged and uneven were a joy to put together!
At just a quarter plate over five bricks tall, Regirock is the tallest of the three (with Regice just under it, and Registeel a full brick shorter), but still small enough to barely stand over a minifigure. Their bodies were built with similar 3×3 dimensions (not counting the arms and other parts that stick out) so they're compact enough to all be used in the same hidden chamber space and be used as "following Pokemon" (like in HGSS and S/V). Regirock was built in BrickLink Studio using legal building techniques and no custom pieces, so anyone can do it!
As a bonus for you guys, I made a little scene of Brendan encountering the Regi trio with his starters and losing horribly (he needs to train them more!) to the overwhelming power of the ancient golems!
by 15_Silver_Points