James Monroe, character in Ace of Spades (serial)

In Ace, however, The Shadow had met an adversary who was prepared for such an action.

As appearing in Ace of Aces, (main roles and screen credits identified):

Douglas avoided a Headbutt by Spivey and tagged in Ace.

Here's how Texas Tech lines up in Ace Rip, its most common formation.

Angrily Strampf called in Ace and another guard.

William A. Steele, character in Ace of Spades (serial)

Likewise, you have a 15% chance of getting Crown noise in Red Joker, but only 3% in Black Ace.

Dan Harvey, character in Ace of Spades (serial)

The same familiarity is present in Ace and Hex's conversations.