CoIntiDencesさんのイラストまとめ

The backgrounds used in Dragon: Marked for Death, both ones in stages and ones in stores and menues, are slowly being ripped from the PC version of the game by dedicated fans. Here is a sample:

Gunvolt's outfit has changed throughout the Azure Striker Gunvolt series. Initially he donned a QUILL uniform: In Azure Striker Gunvolt 2, he's not part of any faction, but his outfit was given to him by Quinn. In Azure Striker Gunvolt 3, he wears a uniform from Sumeragi.

This piece of artwork was made by Yuji Natsume in 2017 to celebrate Blaster Master Zero recieving 100 000 downloads.

Part of it shows Eve about to add something dangerous to her cooking. The box is eerily similar to the chemical Fred eats in the original Blaster Master.

Composition-wise, the artwork is also similar to the key art for Azure Striker Gunvolt's 2015 Steam port.

Thanks to @TheFriendlyDra1 for the submission!

Jason in Blaster Master Zero studies a mysterious creature that he names Fred. The game's opening narration highlights that Fred bears no resemblance to any known creature in the world.

Curiously, his colors and physique resemble Burble Hekelot from Mega Man Zero 2.

The first form of Sigma in Mega Man X3 wields a rounded, glowing shield glowing in his battle with X, that he tosses in a boomeranging arc as a form of attack. It's possible that this is what inspired the Shield Boomerang from the Mega Man Zero series.

The Second Armor in Mega Man X2 allows X to store up a second charge shot for later use, with the second charge shot being surrounded by smaller fireballs. This feature was directly re-implemented into Model X in Mega Man ZX.

The many boxarts of the Azure Striker Gunvolt: Striker Pack. In order:
-3DS, published by Yacht Club Games in US only, 2016
-3DS, published by Inti Creates in JP only, 2016
-Switch, published by Inti Creates in JP and Nighthawk Interactive in US/EU, 2017
-PS4, same as above, 2020

This one may very likely be a coincidence, but its a fun one: The key art of Zero used to introduce him in the original Mega Man Zero is strikingly similar in pose to key art of Zero from Mega Man X4, the first game in the series to truly delve into Zero's past.

In the pre-production phase of Blaster Master Zero 2, the game was originally to use the letter "G" instead of the number. You can still see it referenced in the game's logo as seen here!

With Blaster Master Zero 3, something similar seems to have been done with the letter "R"