@oristarA,
Ndrew Barry may argue this assertion but history doesnt bear it out much. "Sidekick" is an accurate descriptive term because Wallaces original paper that stunned Darwin in 1858, was a mere descriptive intro to the tendency of speces to change over time.
When the joint papaer was presented in 1858 to the Academy, it was actually cobbled toether from Wallaces little work and Darwins 1844 intro to one of his notebooks as to what hes been finding
Wallace had no mechanisms for evolution--Darwin did
Wallace believed that evolution happened to the "group" , Darwin ws proving that its a change manifested via changes on individuals (DArwin was right)
Darwin asserted species intra competition, Wallace believed in species changing to meet a changing environment (He later modifies this with using some Darwinian logic to propose the "Wallace Effect".
Darwin did the math re: the importance of sexual selection, Wallace had no clue
Wallace became an outspoken teleological spiritualist thinker (He became "done" with natural selection because it only occured three times in the world.
Wallace did some good sdescriptive work (like he described the "Wallace Line" in the malay wherein animals on the West of the line were clearly Asian, and animal species (and plants) on the east were polynesian Island species (The mechanism, tectonics) wasnt understood until Wegener spoke out in ten1920's
Ive never bee a fabn of heaping so much praise on Wallace because he was only as heavy duty a thinker about evolutionary mechanisms as was Lamark or Buffon. I believe "sidekick" is accurate and it limits Wallaces importance IMHO.
Theres no rule that anything thats on the web is correct (Im sure most Wallace "lovers" will disagree with my stuff.